Malicious PDF — malware analysis report

Static analysis result for SHA-256 86193bafff08a813…

MALICIOUS

PDF

42.4 KB Created: 2020-04-02 08:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: c0b3421e0c68871449d7d0dc9ddbe260 SHA-1: f05863b0749b1eac0cf0ae92bb5bfaee0d8928a7 SHA-256: 86193bafff08a8137af7271a6cb38fc1082d889df4cc5bffd135c504fddca414
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or a method to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests an attempt to manipulate search engine results or redirect users to potentially harmful sites. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

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://mysoundcollective.com/uploads/1/3/0/3/130379371/130379371.html#tiempos+quirurgicos+de+la+mesa+de+ri%C3%B1on+pdf PDF link annotation
    • http://doranyprzyloz.com/uploads/1/3/0/4/130476878/00b0d0b445a62.pdfIn PDF document text
    • http://compliancelynx.com/uploads/1/3/0/2/130288962/pokegunu.pdfIn PDF document text
    • http://pedaleaquenoespoco.com/uploads/1/3/1/4/131437462/e24bd26b8735.pdfIn PDF document text
    • http://mountainpinestreetreachprogram.com/uploads/1/3/1/3/131380183/jagularetomol-dajop-zefarajitawow-nimupuzux.pdfIn PDF document text
    • http://joinplatinumteam.com/uploads/1/3/1/4/131438282/e666849ea25ea8c.pdfIn PDF document text
    • http://snookathletics.com/uploads/1/3/0/5/130588222/2448036.pdfIn PDF document text
    • http://janettedmiller.com/uploads/1/3/0/6/130620362/3081675.pdfIn PDF document text
    • http://chrisarkwright.com/uploads/1/3/0/7/130739833/5180549.pdfIn PDF document text
    • http://bluestoneag.org/uploads/1/3/0/4/130489247/pelulemiruri-visisakamafowu-ridikan-jonowiwaj.pdfIn PDF document text
    • http://valleyevictions.com/uploads/1/3/0/7/130739150/7801304.pdfIn PDF document text
    • http://idealdance.net/uploads/1/3/0/8/130873951/muvugebevam.pdfIn PDF document text
    • http://truecorners.com/uploads/1/3/1/3/131381369/fiwar-zejagami.pdfIn PDF document text
    • http://alianzaporlademocracia.org/uploads/1/3/1/3/131380225/ee3bcdc47.pdfIn PDF document text
    • http://tntstasteepastrees.com/uploads/1/3/0/2/130287737/cf5dd92bf2ddef.pdfIn PDF document text
    • http://gaiamjewellery.com/uploads/1/3/0/7/130738997/fbcf4dd5fe.pdfIn PDF document text
    • http://marinecoutelas.com/uploads/1/3/0/6/130603764/debevukexopip-komibokedixuse-gazesatav-wemetutajedaw.pdfIn PDF document text
    • http://janbidwellconsulting.com/uploads/1/3/0/5/130546803/d04f09e.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 1

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_off00007b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8F 8400 bytes
SHA-256: 25a0872054cca93b3fd9b8bf72cbe079b63b2e0a201ed5431bd67209cb68ad19

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