Malicious PDF — malware analysis report

Static analysis result for SHA-256 3764665652bec4fb…

MALICIOUS

PDF

86.0 KB Created: 2020-03-22 06:28:32 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: c0fb379ac28858403aecf1abbe083608 SHA-1: c2badd8ae5405c629be0bf4a282e8b6b2bbc399d SHA-256: 3764665652bec4fb08f50fc4763cd1deafbefaae40d4e1996f908689688e1762
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of external links, many of which point to PDF files hosted on various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a tactic to distribute malicious content or engage in SEO manipulation. The ML classifier strongly flagged this PDF as malicious. The embedded URL and the document body text, though obfuscated, suggest a lure related to 'advanced technical analysis software'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://hes-nms.com/uploads/1/3/0/2/130288506/130288506.html#advanced+technical+analysis+software PDF link annotation
    • http://hki-kids.com/uploads/1/3/0/6/130604077/fewodexarofesak.pdfIn PDF document text
    • http://sensaur.com/uploads/1/3/0/7/130776847/vuvobevalufalador.pdfIn PDF document text
    • http://traversecityinnovators.org/uploads/1/3/0/5/130588964/panotu.pdfIn PDF document text
    • http://kerrialisonart.com/uploads/1/3/0/5/130545241/zekomego.pdfIn PDF document text
    • http://cpanel.digitalsaintsdesign.com/uploads/1/3/0/7/130775936/bf4be846794a02.pdfIn PDF document text
    • http://www.impression-sunrise.com/uploads/1/3/0/7/130776099/c433d86.pdfIn PDF document text
    • http://richfieldfoundation.org/uploads/1/3/0/3/130313378/wirap.pdfIn PDF document text
    • http://www.homestyleprofilm.com/uploads/1/3/0/8/130874377/5155110.pdfIn PDF document text
    • http://valeriaedgar.com/uploads/1/3/0/4/130483487/3019157.pdfIn PDF document text
    • http://polato.net/uploads/1/3/0/6/130620431/zojuzetajika-nikuzufudegax.pdfIn PDF document text
    • http://mta-sts.mail.browneyedjewnicorn.com/uploads/1/3/0/7/130775013/df4fc1174ccad3a.pdfIn PDF document text
    • http://mail.bigcreekkennels.com/uploads/1/3/0/4/130476513/3356366.pdfIn PDF document text
    • http://www.chitchatchan.com/uploads/1/3/0/7/130738730/84985aa819ec6e.pdfIn PDF document text
    • http://guitarporno.com/uploads/1/3/0/5/130550915/8037815.pdfIn PDF document text
    • http://sharkvisionpictures.com/uploads/1/3/0/2/130271116/0aa5f.pdfIn PDF document text
    • http://vote4haymour.ca/uploads/1/3/0/7/130738542/tugisujudazobun.pdfIn PDF document text
    • http://nickkessler.net/uploads/1/3/0/4/130435547/3938682.pdfIn 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

Related samples 3

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_off000127b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B2 9260 bytes
SHA-256: 5f26b2591cf56e25be64dd5eef35e2d89e6a9fc00a30cf83253ffa724eecd0d7

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