Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae6bafa94842357…

MALICIOUS

PDF

87.9 KB Created: 2021-06-10 01:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2a5a0390186ec0c9d99ba54a41b223ad SHA-1: c2e2f998ebb2b5b406f3ffaae95480f91951095c SHA-256: 5ae6bafa9484235746f97eb01280f0ec5a36e155765be1d72907b4fd976e08c3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://archism.ru/pbw?utm_term=star+wars+the+last+jedi+incredible+cross+sections+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404965/normal_60546725aac14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408197/normal_60334650e1ddc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449392/normal_602ab654352a7.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4489844/normal_60b1b97b8218f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_60b8011870245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450003/normal_5fda0d78a3632.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4375894/normal_60b66825e7106.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417423/normal_60589b7518ca2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447087/normal_6027d77aa8d43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528780/normal_6003538a0aa6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454422/normal_60628d11ed261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391636/normal_60271bcba6a1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420767/normal_5feea1024a9f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4241aa15-9951-43bd-a6ab-7f8ccbe0c950/riders_of_the_purple_sage_cast.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/borg_warner_t5_fluid_capacity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65294110-873c-4bb9-87fe-2057b3628ac3/hp_e93839_motherboard_lan_drivers.pdfIn PDF document text
    • http://fevuxowina.pbworks.com/f/mavizexopekebigujilejafir.pdfIn PDF document text
    • http://gabekujijud.pbworks.com/f/70068237319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3f2ec59-0e9f-43d2-b5f9-553530172203/gezoluvuduwavutuguzuxuv.pdfIn PDF document text
    • http://bofamawetodo.pbworks.com/w/file/fetch/144566796/94747949814.pdfIn PDF document text
    • http://febevolojezu.pbworks.com/w/file/fetch/144994125/pudapogozisa.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10942 5444 bytes
SHA-256: 60355aff7ace9d5fce1738915b694ed934f8b7d901fdcb6e7ba7d88c56d5a784
font_01_sfnt_off00011bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBB 11028 bytes
SHA-256: 4e6eb4815bde8eeb9c9717c67fbd366abfacbafad772e5d5084c67659967db95
font_02_sfnt_off00014169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14169 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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