Malicious PDF — malware analysis report

Static analysis result for SHA-256 8313160924eabd4a…

MALICIOUS

PDF

30.6 KB Created: 2020-05-06 06:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 93dfffbc8904ad1567f65e8ee839e5fa SHA-1: 5d71d1a0d70e9971407a571420085af8dea3a806 SHA-256: 8313160924eabd4a73bb75a0325f1fcc70bff454c3f54fd55620d5bd421e68fa
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm, suggesting a malicious SEO or content distribution scheme. The ML classifier strongly indicated maliciousness. While no scripts were extracted, the embedded URLs are the primary indicators of malicious activity, likely leading to further compromise or unwanted 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://pantsuitlawyers.org/uploads/1/3/0/6/130639926/130639926.html#boney+m+songs+audio+free
    • http://michaeljamesvocals.com/uploads/1/3/0/5/130539679/03ac3a.pdf
    • http://ledgeviewdairyconsulting.com/uploads/1/3/1/3/131398053/8430217.pdf
    • http://captainmcphilip.com/uploads/1/3/1/3/131383388/7267008.pdf
    • http://debtreliefamerica.net/uploads/1/3/0/6/130620776/b447aefce.pdf
    • http://leitgeb-partner.com/uploads/1/3/0/2/130271117/lozukaxe_towepopupizif.pdf
    • http://m4asanow.com/uploads/1/3/0/5/130590235/vasiko.pdf
    • http://takedownbullying.com/uploads/1/3/1/4/131453248/retijafusurix-jedin.pdf
    • http://jean-frank-stark.com/uploads/1/3/0/7/130740045/mojupugatoxolupewefe.pdf
    • http://eyesonyoucosmeticsshop.com/uploads/1/3/0/2/130289278/799674.pdf
    • http://artrightmagazine.com/uploads/1/3/0/9/130969704/zibobepepemafen_jamokogakatof_kopajob_bamudopeg.pdf
    • http://gather77.com/uploads/1/3/0/4/130435556/pudobumu-roditowuwuga-zobudari-potagozides.pdf
    • http://planetoasis.fun/uploads/1/3/1/6/131637873/wimeregukok.pdf
    • http://markskillington.com/uploads/1/3/0/3/130379341/5346819.pdf
    • http://treicheuro.com/uploads/1/3/0/3/130313803/43806bcdd7149.pdf
    • http://queebly.com/uploads/1/3/0/6/130639138/6531532.pdf
    • http://businessfromhomesolutions.com/uploads/1/3/0/8/130874317/kevudeti_lijexi_nupejon_gixabu.pdf
    • http://icecasting.net/uploads/1/3/0/8/130813991/wolepefodokeba-muwop.pdf
    • http://avalias.net/uploads/1/3/0/2/130288571/jolaxonozopalala.pdf
    • http://devonlamar.net/uploads/1/3/0/9/130969819/tibim.pdf
    • http://myblackvotematters.com/uploads/1/3/1/1/131163955/vejikazufojuzokad.pdf
    • http://adamssmokedmeats.com/uploads/1/3/0/8/130874258/vobiwuva_lolapaku_bigatefewuk.pdf
    • http://ips5presentation.com/uploads/1/3/0/6/130604332/rarede_nazos_ralube.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/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_off00004fd0.bin
fa10f6238e233152a466b23c9153d17e0f60c78d35e23fa524afc5a040d88a2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FD0 9416 bytes

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