Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c702729db37acd…

MALICIOUS

PDF

45.0 KB Created: 2020-03-07 17:40:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 5957b4446e8631bc4b14276a14682650 SHA-1: edb62eb9211e54c6354c910fb79744ff0b564734 SHA-256: 56c702729db37acdfb04ec8a6aa7b97902e4bda5ff52ab8a73bfa154bbc6b515
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many with numeric or generic slugs, indicative of a link farm or SEO spam campaign. The document body, though partially corrupted, mentions 'free printable math pages for 4th grade', a common lure for educational content. The primary heuristic 'PDF_SEO_LINK_FARM' confirms the mass external linking. The embedded URLs likely lead to further malicious content or phishing pages.

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://74-123-76-170.mgwnet.com/uploads/1/3/0/2/130289196/130289196.html#free+printable+math+pages+for+4th+grade PDF link annotation
    • http://www.abbydecoratingden.com/uploads/1/3/0/6/130621651/denelana-kelitukivuzokab-pukoposidopule-fotasa.pdfIn PDF document text
    • http://mitefnw.org/uploads/1/3/0/5/130550944/givona.pdfIn PDF document text
    • http://phillipsconsulting.org/uploads/1/3/0/7/130776648/kipeziwomi-luvaf.pdfIn PDF document text
    • http://www.cre-kate-ive.co.uk/uploads/1/3/0/2/130287394/3d5f37b.pdfIn PDF document text
    • http://mikaimtrading.co.za/uploads/1/3/0/2/130274146/dcf155a7.pdfIn PDF document text
    • http://howmuchtrip.com/uploads/1/3/0/4/130436094/baxuzojax_ninepekezik_sepem_xaliwisemil.pdfIn PDF document text
    • http://dosyataciri.com/uploads/1/3/0/7/130776076/junojiruxexe.pdfIn PDF document text
    • http://pmpclones.com/uploads/1/3/0/5/130542894/zegomegiwipon.pdfIn PDF document text
    • http://oakleighfarmstud.com/uploads/1/3/0/6/130620606/xanozawuvovoje_vubegasazax.pdfIn PDF document text
    • http://ladiffproprete.net/uploads/1/3/0/8/130813314/jajetotusojajijugane.pdfIn PDF document text
    • http://brightpolicysolutions.com/uploads/1/3/0/9/130969990/jejireditox_xiwaxumepofijol_tobulaneb_levigufevo.pdfIn PDF document text
    • http://thisislawrence.com/uploads/1/3/0/6/130621324/8e80bc1bd7dfc33.pdfIn PDF document text
    • http://lippincotts.net/uploads/1/3/0/6/130621425/2321024.pdfIn PDF document text
    • http://chunkyscrunchiez.com.au/uploads/1/3/0/6/130639107/buzojamuw.pdfIn PDF document text
    • http://nextlevelnl.org/uploads/1/3/0/3/130379199/nudefejeruwaj.pdfIn PDF document text
    • http://www.goodfightstudios.com/uploads/1/3/0/6/130604948/2957806.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_off00007b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B59 8144 bytes
SHA-256: f84e4f9d528222e3d5b3914b521e9b318a14ad314fa2de6ca10aa0b7231295d9
font_01_sfnt_off00009ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ADE 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea

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