Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af1a1bcecf01505…

MALICIOUS

PDF

66.9 KB Created: 2020-12-05 03:53:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ba0b37c507c67f4b5248f6dba05677a6 SHA-1: 1a627cd3eb8d87ad5f68c372a2254e4aef221abc SHA-256: 6af1a1bcecf0150559c8c5ef101ab67e4a6a9c6c0f90054e6945ba00949a4a28
246 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. It uses brand-impersonation credential phishing. 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 0.9997

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://ramokazadi.weebly.com/uploads/1/3/4/4/134470245/44c8f1569251.pdf.
  • 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=ship+trap+island+quotes PDF link annotation
    • https://ramokazadi.weebly.com/uploads/1/3/4/4/134470245/44c8f1569251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409411/normal_5f958719209fd.pdfIn PDF document text
    • https://nasotatuji.weebly.com/uploads/1/3/4/3/134392375/caea538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5f9a3bcc00090.pdfIn PDF document text
    • https://wifenawejiwatu.weebly.com/uploads/1/3/4/8/134879118/fikipilezora_gikavifugefa_zafuzapukusetap_tasada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379231/normal_5f8d192c1d6f0.pdfIn PDF document text
    • https://jofogeva.weebly.com/uploads/1/3/4/5/134505403/27b5a74145e7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371248/normal_5fad86db68cd0.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/cdd6cca78de46c.pdfIn PDF document text
    • https://dowikawi.weebly.com/uploads/1/3/4/7/134741621/070d65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5fb62750dbb36.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf2061af5bf52c32660e1/1606218247960/house_of_faun.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc117e49955c744b53cb0dd/t/5fc3a03af8cdb769c6526dba/1606656059496/83254866631.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_off0000cb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7A 5276 bytes
SHA-256: f425a7b9dfa4dd7d2a7dfcb4cdc9bb7479c7d2830043819a3251cb69e6b31633
font_01_sfnt_off0000dd57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD57 10136 bytes
SHA-256: 1b5f6364ca8f2ad7f7738cf246566469b10c5d3a4691b3f69f440890963edfe7

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