Malicious PDF — malware analysis report

Static analysis result for SHA-256 6725a6a1a12bd6f0…

MALICIOUS

PDF

79.5 KB Created: 2020-12-06 17:59:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b43d98c2f7b442f6076d112734ac6de6 SHA-1: 92f6a3445fa8fa16b44ba12e327e1fd435f65c6f SHA-256: 6725a6a1a12bd6f08244f205903ad6ef930a0df47fe45887ef86c4db1f846b04
224 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic 'SE_MFA_LURE' indicates the document is designed to harvest credentials or session tokens, likely by directing the user to a phishing page. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit vulnerabilities or trick the user into executing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • 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://traffmen.ru/123?utm_term=wizard+gear+guide+bdo In PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/dizufikapuk.pdfIn PDF document text
    • https://zufuxanibagi.weebly.com/uploads/1/3/4/5/134586570/nosematejulu_luxamalamalure.pdfIn PDF document text
    • https://vuvajufuzuno.weebly.com/uploads/1/3/4/4/134480129/zijalusinex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_5f8aa1ebb2f91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424985/normal_5fca6def718cc.pdfIn PDF document text
    • https://jagotizepevex.weebly.com/uploads/1/3/4/4/134464701/nisalakujuwolibes.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/5fc17203e2fce462bc8fc7f8/t/5fc431779d7936484012c8e3/1606693240251/repefogutev.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/35208162109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c481136b-d121-498c-bf81-8ca2889db9f9/51865932400.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1f313570fb44d1cbf2ce/1606295346559/46708578320.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DE 4988 bytes
SHA-256: 864567a7ef2c42f8b00c15b9f70056489b5324cc41014282e955ac0cd66fde82
font_01_sfnt_off000101f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F2 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00010a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A80 11312 bytes
SHA-256: 4d13a7c5b0178a723c6d13da0c0d40982808320b9918d5586e44967ccb132a70

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