Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e1627ec710830b…

MALICIOUS

PDF

43.0 KB Created: 2020-04-30 15:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 7972cb1ef34c7c3107cc3c74a30cadb0 SHA-1: 892e588aac389423496111dc6acab1903a383caf SHA-256: b6e1627ec710830b6cdee42ef555c956609fbea842f882fece1ed77529e61d3c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.001 Malicious Link

The PDF contains a significant number of external links, identified as a link farm, pointing to various PDF files hosted on different domains. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates the presence of instructions for executing Windows scripting tools, suggesting a potential for further malicious activity beyond just link redirection. The primary intent appears to be directing users to a network of sites, likely for SEO manipulation or to serve as a distribution point for other malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://attributioninsightengine.com/uploads/1/3/0/5/130550824/130550824.html#golden+wind+op+piano+sheet PDF link annotation
    • http://speakingevolution.org/uploads/1/3/1/4/131437649/6523009.pdfIn PDF document text
    • http://barenaturalsoaps.com/uploads/1/3/0/5/130551718/nofutaje-negagatepusa.pdfIn PDF document text
    • http://willowlaneprints.com/uploads/1/3/0/6/130620858/dibafosefinilaz_jitojewi_vopalaw.pdfIn PDF document text
    • http://ninadreyerlcsw.com/uploads/1/3/0/5/130589100/8197996.pdfIn PDF document text
    • http://kevinsplumbingandwaterheaterbusiness.com/uploads/1/3/0/3/130323181/d0683332.pdfIn PDF document text
    • http://gowthamportfolio.net/uploads/1/3/1/1/131164210/jegolaketidoba.pdfIn PDF document text
    • http://theec.org/uploads/1/3/0/8/130874164/gebebuxoram.pdfIn PDF document text
    • http://plsdecorators.com/uploads/1/3/0/4/130476277/8286634.pdfIn PDF document text
    • http://curacionatural.com/uploads/1/3/0/5/130538840/pexidiferebulek.pdfIn PDF document text
    • http://chanisesboutique.com/uploads/1/3/0/5/130589312/8281490.pdfIn PDF document text
    • http://sacfskitchener.com/uploads/1/3/0/6/130640029/136696064.pdfIn PDF document text
    • http://drlisamurphy.com/uploads/1/3/0/3/130313091/eb980963.pdfIn PDF document text
    • http://theapplemechanic.com/uploads/1/3/0/7/130775192/vizenujetabakex-wafejomi-dipawobikerufel.pdfIn PDF document text
    • https://musescore.jsonp?revision=1545320084&no-In PDF document text
    • https://teespring.com\rTheIn macro / runtime command snippet
    • https://musescore.01000000000000000020816681711721685132943093776702880859375},{In PDF document text
    • https://discord.com/static/musescore/userdata/avatar/2/6/5/9404191.1000000000000000055511151231257827021181583404541015625In PDF document text
    • https://musescore.0200000000000000004163336342344337026588618755340576171875In PDF document text
    • https://musescore.mp3?revision=1545320084&no-cache=1588251321In PDF document text
    • https://musescore.netIn PDF document text
    • https://musescore.gg/MJbY7YEIn PDF document text
    • https://musescore.musescore.chewIn PDF document text
    • https://musescore.1000000000000000055511151231257827021181583404541015625In PDF document text
    • https://musescoreIn macro / runtime command snippet
    • https://musescore.midIn PDF document text
    • https://nocdn.com/user/9404191/scores/5361904In PDF document text
    • https://musescore.com%2Fuser%2F9404191%2Fscores%2F5361904In PDF document text
    • https://musescore.musescoreIn PDF document text
    • https://musescore.com/static/musescore/scoredata/gen/4/0/9/5361904/339b60c73620dfeff258cd3b80e9e9ec570c6520/score.com/static/public/img/musescore/piano_rollIn PDF document text
    • https://musescore.com/ug/In PDF document text
    • https://musescore.com/static/musescore/scoredataIn PDF document text
    • https://musescore.com/user/9404191/scores/5361904/embedIn PDF document text
    • https://musescore.com/groups/animevideogamemusicsheet-and-score_/In PDF document text
    • https://musescore.com/groups/anime/In PDF document text
    • https://musescore.com/user/9404191In PDF document text
    • https://musescore.com/groups/improving-musescore-com/discuss/5029644In PDF document text
    • https://musescore.com/sheetmusic-flowkeyIn macro / runtime command snippet
    • https://musescore.com/stores/smbIn PDF document text
    • https://musescore.com/user/21585386\rSupportIn PDF document text
    • https://www.com/user/9404191In PDF document text
    • https://musescore.com/score/stats/viewIn PDF document text
    • https://musescore.com/static/musescore/scoredata/gen/4/0/9/5361904/339b60c73620dfeff258cd3b80e9e9ec570c6520/score_0.com/static/musescore/scoredata/gen/4/0/9/5361904/339b60c73620dfeff258cd3b80e9e9ec570c6520/In PDF document text
    • https://musescore.ultimate-guitar.com/song/jojos_bizarre_adventure_golden_wind_giornos_theme_il_vento_doro-1579339In PDF document text
    • https://musescore.com/static/musescore/scoredata/gen/4/0/9/5361904/339b60c73620dfeff258cd3b80e9e9ec570c6520/score_0.200000000000000011102230246251565404236316680908203125In PDF document text
    • https://musescore.com/groups/video-game-and-anime-music/In PDF document text
    • https://musescore.openx.comIn PDF document text
    • https://musescore.com/static/musescore/scoredata/gen/4/0/9/5361904/339b60c73620dfeff258cd3b80e9e9ec570c6520/score_0.jpg@150x150?cache=1483949701In PDF document text
    • https://tinyurl.com/user/9404191/scores/5361904In PDF document text
    • https://musescore.com/artist/misc_cartoons-132303In PDF document text
    +8 more URL(s)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB9 9356 bytes
SHA-256: 4c9a740fd26821fefb3ba3b24739ac7e9ee3a07df7e21fe066933d5796e0451f

Open this report in the interactive analyzer, or submit your own file for analysis.