Malicious PDF — malware analysis report

Static analysis result for SHA-256 c32566272e0bccba…

MALICIOUS

PDF

76.0 KB Created: 2021-03-13 14:56:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 435f3bc23c9dbedadc9991d32db7d5f2 SHA-1: 17fb02a09248984ddb022076eb5c150eb274cbf2 SHA-256: c32566272e0bccba7c870ccb71efe6315c92b0a51321151c11e31bb7c529a757
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://midufefew.ru/award?keyword=amines+12th+pdf PDF link annotation
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/47601a9034.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457320/normal_60436efc907d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450639/normal_5fdbde7b396dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379982/normal_5fd1078e38794.pdfIn PDF document text
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/5646635.pdfIn PDF document text
    • https://cdn.sqhk.co/jukusenefow/dimjhge/nuvewad.pdfIn PDF document text
    • https://lanutitokoxoziv.weebly.com/uploads/1/3/4/0/134096970/rezevoronalibo_guxevizewazivu_sejesar.pdfIn PDF document text
    • https://kerejuwapezokuk.weebly.com/uploads/1/3/4/7/134765041/5a26a14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383464/normal_602ca0bdaa1b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487419/normal_600eb0e10157e.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/bkhfnjh/tipan.pdfIn PDF document text
    • https://kugavulaxux.weebly.com/uploads/1/3/4/4/134454690/gagugaxajewubivaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456389/normal_5fe7ae42415a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374852/normal_5ffa4f6e88cc8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/begerugisodobereb.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/dynasty_warriors_gundam_reborn_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/business_plan_template_ppt_files.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/used_ranger_boats_for_sale_in_ontario.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_off0000ec8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8F 5116 bytes
SHA-256: 56dc66d5e4da400a4d7e915ff8541e1d6de4f16654ff871d31279be353421cfe
font_01_sfnt_off0000fde2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE2 10964 bytes
SHA-256: fb64be039c9780f56be390bbd8d27af7247d386fae942605b54a01d6ceed72f9

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