Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e145c61c2f4ee69…

MALICIOUS

PDF

41.4 KB Created: 2020-03-09 04:16:07 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 349c3c37713b078344a53b87e8c61251 SHA-1: da1bccdb98e973ef8a1a787d98814d73e11c0d69 SHA-256: 5e145c61c2f4ee69e379e67dbd70b10a23add70a68914005ff1ba75ec02d9180
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of embedded external links to various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this PDF as malicious. The primary purpose appears to be directing users to a vast network of linked PDFs, potentially 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://wagenselleryoga.com/uploads/1/3/0/7/130775245/130775245.html#ftir+spectroscopy+instrumentation PDF link annotation
    • http://ru.st-clarinet.com/uploads/1/3/0/2/130288522/xesudo-gorakewe-dixaruw.pdfIn PDF document text
    • http://houndstretcher.net/uploads/1/3/0/2/130271004/giwuw-zagimalono-sutuzomukemuvut-sijewagole.pdfIn PDF document text
    • http://eaganwindowwashers.com/uploads/1/3/0/5/130540208/8627364.pdfIn PDF document text
    • http://gtyp.org/uploads/1/3/0/8/130813458/jukamosirawaxelumazo.pdfIn PDF document text
    • http://ruthcadioli.com.au/uploads/1/3/0/6/130604408/mizaka-vemiwi-ketup.pdfIn PDF document text
    • http://upscalechurchsuits.com/uploads/1/3/0/5/130539672/zegafuzikab-jokixigele-woxerelibuxale.pdfIn PDF document text
    • http://alexandermgmtnyc.com/uploads/1/3/0/3/130323120/d5e7eb3744.pdfIn PDF document text
    • http://shelterbyjesus.org/uploads/1/3/0/5/130590457/besekepavevi.pdfIn PDF document text
    • http://nckphotography.com/uploads/1/3/0/6/130621082/mofonuvajiged.pdfIn PDF document text
    • http://thebelugaproject.org/uploads/1/3/0/8/130814754/verumajus.pdfIn PDF document text
    • http://www.bestclubslasvegas.com/uploads/1/3/0/9/130969907/4962973.pdfIn PDF document text
    • http://fromtheheartllc.org/uploads/1/3/0/2/130288552/9082530.pdfIn PDF document text
    • http://cpanel.2texasdips.com/uploads/1/3/0/4/130489358/8441214.pdfIn PDF document text
    • http://racinemetalrecycling.com/uploads/1/3/0/4/130483757/1813936.pdfIn PDF document text
    • http://spread--love.com/uploads/1/3/0/8/130873771/f1b70969257.pdfIn PDF document text
    • http://ellaellaella.com/uploads/1/3/0/7/130775145/f5e7b0230c2497.pdfIn PDF document text
    • http://www.jarsofdirtstaging.com/uploads/1/3/0/8/130874121/557024361811.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCF 7872 bytes
SHA-256: 5a97b93384426f9cb50f868c48b9e28242cffff8d97ebdaab4dbc084bb3a214a
font_01_sfnt_off00008e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E53 2732 bytes
SHA-256: 171f8a79f44c817cfb5de1f8154ee08a86d70c6dbb15210f7216abbc77b54c6b

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