Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b615a37c98e79c4…

MALICIOUS

PDF

49.2 KB Created: 2020-04-27 06:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-07
MD5: 009636ea88edd50365156f81f1a840f5 SHA-1: fb7e80bb7bb7f6986c319d95c90d250e28f08819 SHA-256: 4b615a37c98e79c41c88e6505a8bbd03a7e6ad848a33fdc77dae92f01aa35d4f
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which appear to be part of an SEO link farm. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates that the document contains instructions for executing Windows scripting tools, suggesting an intent to run malicious code or redirect the user to harmful sites. The embedded URLs are likely part of this redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • 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.
  • 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://eliserodriguez.com/uploads/1/3/1/4/131438583/131438583.html#kiss+the+rain+flute+sheet PDF link annotation
    • http://hockeysmysport.com/uploads/1/3/1/4/131438241/silefoweros.pdfIn PDF document text
    • http://butzencreative.com/uploads/1/3/0/3/130379098/e0fa9611270c0b.pdfIn PDF document text
    • http://osrsgpnow.com/uploads/1/3/0/6/130604550/xitivewapuzo_povefodifu_venotugoxatab.pdfIn PDF document text
    • http://alumark-gerueste.de/uploads/1/3/1/4/131453119/43fd2.pdfIn PDF document text
    • http://geissler.pro/uploads/1/3/0/6/130620543/fewetinezilexawexexa.pdfIn PDF document text
    • http://searolf.org/uploads/1/3/0/4/130489841/2689e65612d352e.pdfIn PDF document text
    • http://goodstreetbaptistchurch.net/uploads/1/3/1/3/131380636/4899413.pdfIn PDF document text
    • https://musescore..com%2Fuser%2F10371176%2Fscores%2F3507706In PDF document text
    • https://creativecommons.FluteNotes.mid?revision=1488632263In PDF document text
    • https://musescore.com\rTheIn PDF document text
    • https://musescore.G2VIIn PDF document text
    • https://musescore.mp3?revision=1488632263&no-cache=1587959988In PDF document text
    • https://musescore.01000000000000000020816681711721685132943093776702880859375In PDF document text
    • https://musescore.jpg@150x150?cache=1488655788In macro / runtime command snippet
    • https://musescore.200000000000000011102230246251565404236316680908203125In PDF document text
    • https://musescore.ultimate-guitar.png@300x420?no-cache=1579193023&bgclr=ffffffIn PDF document text
    • https://musescore.jpg?cache=1488641919In PDF document text
    • https://musescore.mid?revision=1488632263&no-cache=1587959988In PDF document text
    • https://nocdn.com/static/musescore/scoredataIn PDF document text
    • https://musescore.040000000000000000832667268468867405317723751068115234375In PDF document text
    • https://musescore.item-list:last-childIn PDF document text
    • https://musescore..05000000000000000277555756156289135105907917022705078125},{In PDF document text
    • https://musescoreIn macro / runtime command snippet
    • https://musescore.musescore.GIIIn PDF document text
    • https://musescore.png@500x660?no-cache=1579193023&bgclr=ffffffIn PDF document text
    • https://musescore.netIn PDF document text
    • https://musescore.1000000000000000055511151231257827021181583404541015625In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://musescore.com/artist/yiruma-140007In macro / runtime command snippet
    • https://musescore.com/sheetmusic/artists/yirumaIn PDF document text
    • https://musescore.com/kxrenIn PDF document text
    • https://musescore.com/user/21585386\rSupportIn PDF document text
    • https://www.com/user/21585386\rSupportIn PDF document text
    • https://musescore.com/static/musescore/userdata/avatar/7/1/9/10371176.5In PDF document text
    • https://musescore..musescore.com/score/stats/viewIn PDF document text
    • https://musescore.com/static/musescore/scoredata/gen/6/0/7/3507706/55e561da87e3ece6a038ec71e030efc889a72971/score_0.netIn PDF document text
    • https://musescore.com/watchIn PDF document text
    • https://musescore.com/watch?v=L-42iZef7y4In PDF document text
    • https://musescore.com/static/musescore/scoredata/gen/6/0/7/3507706/55e561da87e3ece6a038ec71e030efc889a72971/space.youtube.A#VIIn PDF document text
    • https://musescore.com/user/21585386/scores/5634470/piano-tutorial?from=youtube_shareIn PDF document text
    • https://musescore.com/static/musescore/scoredata/gen/6/0/7/3507706/55e561da87e3ece6a038ec71e030efc889a72971/score_0In PDF document text
    • https://musescore.com/user/10371176/scores/3507706In PDF document text
    • https://musescore.comIn macro / runtime command snippet
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    +2 more URL(s)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6C 9456 bytes
SHA-256: bd2054431fb0cdcbb07e0cd5fecea2e0ea0ab07576ced80a6e65d09b64061e93
font_01_sfnt_off0000af44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF44 2696 bytes
SHA-256: 84340d81b687e5658134e86d602934373e4edb1358290f916b35b324124d256a