Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d699e5a033afa8…

MALICIOUS

PDF

39.2 KB Created: 2020-04-03 08:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0d21503c215942f6b54b30d1b7df7941 SHA-1: d6eb557afd566c1d8fb88001ef0d8a5ff418bb88 SHA-256: e7d699e5a033afa84d60618159a194196ad82d81c952776dbc6d0ce1a512ec97
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, includes a URL that appears to be a lure. The ML classifier strongly indicates maliciousness. The primary attack pattern involves redirecting users to a network of linked websites, likely for SEO spam or to host further malicious content.

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://youth2seniors.info/uploads/1/3/0/7/130739095/130739095.html#full+metal+jacket+bathroom+scene+quote
    • http://mrsrachel.com/uploads/1/3/0/5/130547659/webivasidofe-fitem.pdf
    • http://tacsatsupport.com/uploads/1/3/0/7/130775820/laxinulekopet_sasofoxejofalob_funepusixox_gizoli.pdf
    • http://soulfamilyfitness.com/uploads/1/3/0/6/130604568/zebutilifulovetexop.pdf
    • http://wildflowerfarmstead.net/uploads/1/3/1/1/131164038/kigefukuvekelo.pdf
    • http://mouseandcastle.ca/uploads/1/3/0/6/130621240/4197435.pdf
    • http://beefreetees.com/uploads/1/3/0/2/130289359/c01f21b26b.pdf
    • http://thetwospiritsband.com/uploads/1/3/0/6/130621557/7562865.pdf
    • http://antisocial-tenebrosity.com/uploads/1/3/1/1/131163635/nuwap.pdf
    • http://westsidedolphins.com/uploads/1/3/0/4/130488152/sigononorejagug.pdf
    • http://menscentralinmatesearch.com/uploads/1/3/0/2/130270783/nuvigulerunetileweji.pdf
    • http://spiralup127.net/uploads/1/3/1/3/131382907/c42d02897.pdf
    • http://mind-body-spirit-massage.com/uploads/1/3/0/9/130969339/zejupozaxa.pdf
    • http://energy2be.com/uploads/1/3/1/1/131164257/5725200.pdf
    • http://ofertasmedellin.com/uploads/1/3/0/6/130605111/fc8ea5a33d5.pdf
    • http://flydcsc.com/uploads/1/3/0/5/130539238/sajobedube-zirelorejexon-sidos-birejoke.pdf
    • http://greatrecessframework.org/uploads/1/3/0/6/130639379/golejusejarunivumuk.pdf
    • http://rhinestonereject.com/uploads/1/3/0/3/130379182/sarumojijabenaju.pdf
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007028.bin
5d89aabc70028a6f4fa2504f29c00b9eb34b7cb0f8eab5e0927b3291c94ef232		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7028 7964 bytes

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