Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ffc2b4adf816c7…

MALICIOUS

PDF

39.3 KB Created: 2020-04-16 12:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 7ab31a921bf1e66072db15309586983b SHA-1: 517ade04f7d70d77538ad9bcd0a584c6c1588680 SHA-256: 59ffc2b4adf816c75d12a9cae3a343fd235f16b9853a196ca778f56c9752ab2f
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to external websites, many of which are structured as PDF files with numeric slugs, suggesting a link farm or SEO abuse tactic. The document body mentions 'Honeymoon avenue sheet music pdf', which is likely a lure to disguise the malicious intent. The presence of external URIs and a ML classifier flagging the PDF as malicious indicates a high likelihood of this document being used for phishing or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://theslaterhousepdx.com/uploads/1/3/1/4/131453343/131453343.html#honeymoon+avenue+sheet+music+pdf PDF link annotation
    • http://spacelotservices.com/uploads/1/3/0/3/130379336/tobiwaxibes_ragofuruzoduke_mirolane.pdfIn PDF document text
    • http://neutralskincare.com/uploads/1/3/1/4/131407549/gigagoxuduzitoz_jesozepeg_dipirogumixit_xizajosajozetes.pdfIn PDF document text
    • http://101taiwantour.com/uploads/1/3/0/7/130776460/noxumojelepigorop.pdfIn PDF document text
    • http://simonleebooks.com/uploads/1/3/1/0/131070751/gujorun-zisatulane.pdfIn PDF document text
    • http://starlightphotography903.com/uploads/1/3/0/5/130588345/rasowojijozeruroradu.pdfIn PDF document text
    • http://yeomansrow.org/uploads/1/3/1/4/131437987/xoxozon.pdfIn PDF document text
    • https://musescore.mp3?revision=1493088286&no-cache=1587028016In PDF document text
    • https://musescoreIn PDF document text
    • https://musescore.1In PDF document text
    • https://musescore.040000000000000000832667268468867405317723751068115234375In PDF document text
    • https://musescore.1000000000000000055511151231257827021181583404541015625In PDF document text
    • https://musescore.openx.01000000000000000020816681711721685132943093776702880859375},{In PDF document text
    • https://musescore.0In PDF document text
    • https://nocdn.com/static/musescore/scoredata/gen/1/6/7/3792761/7a79f21ce11d697540ff3a019651a83d43ea8bca/score_0.com%2Fuser%2F12101681%2Fscores%2F3792761In PDF document text
    • https://musescore.05000000000000000277555756156289135105907917022705078125},{In PDF document text
    • https://musescore.musescore.com%2Fuser%2F12101681%2Fscores%2F3792761In PDF document text
    • https://musescore.netIn PDF document text
    • https://musescore.jsonp?revision=1493088286&no-cache=1587028016In PDF document text
    • https://musescore.png?no-cache=1531731713In PDF document text
    • https://musescore.com\rTheIn PDF document text
    • https://musescore.0200000000000000004163336342344337026588618755340576171875},{In PDF document text
    • https://www.5In PDF document text
    • https://musescore.musescore.com/static/musescore/scoredata/gen/1/6/7/3792761/7a79f21ce11d697540ff3a019651a83d43ea8bca/score_0.1000000000000000055511151231257827021181583404541015625In PDF document text
    • https://musescore.com/static/musescore/scoredata/gen/1/6/7/3792761/7a79f21ce11d697540ff3a019651a83d43ea8bca/score_0.com/user/12101681In PDF document text
    • https://musescore.com/groups/improving-musescore-In PDF document text
    • https://musescore.comIn PDF document text
    • https://musescore.com/static/musescore/scoredata/gen/1/6/7/3792761/7a79f21ce11d697540ff3a019651a83d43ea8bca/score.com/sheetmusic/artists/thomasIn PDF document text
    • https://musescore.com/user/12101681/scores/3792761/embedIn PDF document text
    • https://musescore.com/static/musescore/scoredata/gen/1/6/7/3792761/7a79f21ce11d697540ff3a019651a83d43ea8bca/space.com/user/12101681/scores/3792761/embedIn PDF document text
    • https://musescore.com/user/12101681/scores/3792761In PDF document text
    • https://musescore.com/static/musescore/scoredata/gen/1/6/7/3792761/7a79f21ce11d697540ff3a019651a83d43ea8bca/score.openx.com/user/12101681/scores/3792761In PDF document text
    • 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
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAF 9220 bytes
SHA-256: 7688a7fdbc1205353aaf604364cd628f0de7c47569bead927ac820895739e281