Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e804b7db31bc7a7…

MALICIOUS

PDF

76.4 KB Created: 2020-12-28 20:05:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b91832557ffff9583b5268350519bfd3 SHA-1: 9c739ca2c007e790845c7cbdefe838093ea6f363 SHA-256: 1e804b7db31bc7a70143c22a5f88c5f279ba33e377807f599c5ec535ad624ee4
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 0.9998

Heuristics 5

  • 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 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://traffking.ru/strik?utm_term=prison+architect+mobile+apk+full+version+ios PDF link annotation
    • https://dudakodut.weebly.com/uploads/1/3/4/4/134497067/vefenejalanu_towozuserum_sewedu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444096/normal_5fb5a6b2739cd.pdfIn PDF document text
    • https://rorekejufekate.weebly.com/uploads/1/3/0/7/130740186/kozamopuwub-defatiwus-zibej-mopiwuregovovu.pdfIn PDF document text
    • https://polivepuba.weebly.com/uploads/1/3/4/5/134582029/245512.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401711/normal_5fb41facbbba3.pdfIn PDF document text
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/jafowef.pdfIn PDF document text
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/3731748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478923/normal_5fb3f105bb479.pdfIn PDF document text
    • https://jaduxokapatusiw.weebly.com/uploads/1/3/5/3/135301375/texitijebok_jureb_sobomerajasov_migozap.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/CgUZijf/16426732062.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/juduk/wadidosijexa.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/71600453070.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_off0000eddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDB 5520 bytes
SHA-256: 5ba702335d8714e1fb0df25672d4733e66a2999b293406088363eea7b35d0283
font_01_sfnt_off0001007c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007C 10724 bytes
SHA-256: b3f13e8d3113ccbc597994cb61fb5a2d4fef76717b4591978ca4f3df8822952c

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