Malicious PDF — malware analysis report

Static analysis result for SHA-256 c410303f51717e39…

MALICIOUS

PDF

72.5 KB Created: 2021-05-24 22:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6e5d343b35b411b0e0cb13db5058807a SHA-1: c1b89f8df14a26c16ae3948769b70d7d14326e78 SHA-256: c410303f51717e39cf45a7c7933bf07439b0d78050072f16f83f2656d4957cb2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://xezojetit.ru/strik?utm_term=cuantas+columnas+tiene+una+hoja+de+calculo+excel PDF link annotation
    • https://juwabizaf.weebly.com/uploads/1/3/0/9/130969053/7757502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489722/normal_606820c66435f.pdfIn PDF document text
    • https://wabelurotetef.weebly.com/uploads/1/3/4/6/134693048/9b0e82901555fce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376609/normal_600351b8a3e0c.pdfIn PDF document text
    • https://takixesa.weebly.com/uploads/1/3/4/6/134621412/5218269.pdfIn PDF document text
    • https://nidimojisojetuz.weebly.com/uploads/1/3/5/9/135962904/f7e7b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387808/normal_5fda2bdf62bfd.pdfIn PDF document text
    • https://zubetotuduve.weebly.com/uploads/1/3/5/3/135340520/suzenululez.pdfIn PDF document text
    • https://kitivagep.weebly.com/uploads/1/3/0/7/130775950/kigogifuv.pdfIn PDF document text
    • https://numesenara.weebly.com/uploads/1/3/1/0/131069843/705274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454824/normal_601e093ef0fc7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367952/normal_5fe403ade91e5.pdfIn PDF document text
    • https://setoximusekaz.weebly.com/uploads/1/3/4/7/134714347/5071093.pdfIn PDF document text
    • https://laxuwipulave.weebly.com/uploads/1/3/5/9/135956831/mokitemuxixijakepar.pdfIn PDF document text
    • https://wobakasufafe.weebly.com/uploads/1/3/2/6/132682589/58bbc3c502e6.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/pazeluzizu_kezuwokujilojo_nitelezejiw_kuxomabenukaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a500d426-6a0e-4fb8-b506-89b09c526ee1/9102390801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd72a7f2-c1a8-47ea-9710-3dd9489f8cfa/pioneering_portfolio_management_review.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

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_off0000dac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC7 5132 bytes
SHA-256: 437846c18f37b494a5d49aacea887f35f9f9bfacab6d455bbce1ca2a8ee412a6
font_01_sfnt_off0000ec1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1B 11836 bytes
SHA-256: a267d01645753102af83ea08d8026401151b7b34e47681a858e3bfe6332018b3

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