Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4f798f77177f03…

MALICIOUS

PDF

40.0 KB Created: 2020-05-30 06:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aab803778c47e87337744dab7621d64c SHA-1: b4ebf77451bad1c69c65fdf051cee7ff90af9d58 SHA-256: 5a4f798f77177f038af4b2772e76f19d6205008d4bc1f16409147979d92cb344
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to suspicious domains with numeric or generic slugs, indicating a potential link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the overall structure suggest an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://cpanel.themodestshoptx.com/uploads/1/3/0/6/130620530/130620530.html#de+que+hablamos+cuando+hablamos+de+amor+raymond+carver
    • http://innovativevette.com/uploads/1/3/0/8/130873869/fa0c3019.pdf
    • http://changinglaneswithmslinda.com/uploads/1/3/0/7/130738652/jovotuvujamuxek.pdf
    • http://radicalmxsports.com/uploads/1/3/1/4/131454560/fe02640a0dc250.pdf
    • http://stanleysicebar.com/uploads/1/3/0/4/130476143/wadaf.pdf
    • http://jewishrenaissanceproject.com/uploads/1/3/1/3/131384148/9571208.pdf
    • http://islnd.store/uploads/1/3/0/5/130551112/wedikanevezomojumi.pdf
    • http://vps1-alek.pleasingfood.com/uploads/1/3/1/4/131455956/86d32bf72.pdf
    • http://perthsophro.com/uploads/1/3/0/4/130483445/zajapa.pdf
    • http://conquerornutrition.com/uploads/1/3/0/8/130813999/lijuxafejufize.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da6.bin
41a308622cc3109a2e7c08b8cf635397cafd3e4e99cdf74c3dfdd52b35c28c09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA6 11488 bytes

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