Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c67ef3295d69c65…

MALICIOUS

PDF

69.2 KB Created: 2020-11-18 14:51:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e00c26b9b2f2f8a36c70760e998ee590 SHA-1: 10105c4db10f88775887edd0c1e9226b5f19297d SHA-256: 2c67ef3295d69c65f7b864c9f9d08ab06969a1eb61e641ba684faf17724779f1
222 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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=agnisakshi+malayalam+movie+songs+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_5fad405445093.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/2b80a9.pdfIn PDF document text
    • https://godowipi.weebly.com/uploads/1/3/4/5/134520373/6226112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381091/normal_5f8fa665d14ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379219/normal_5f91836d390c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379483/normal_5f8dc896084e4.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/dorobukasawituw/hip_hop_listener_demographics.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/vifutelomoxaforoli.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/colour_atlas_of_medical_bacteriology.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/pisowivusiputitebubojo.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/bb_cyber_news_google_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/bibetokelirukuteva.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/38765837823.pdfIn PDF document text
    • https://s3.amazonaws.com/mazugezijap/difupa.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_off0000cf7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7A 5396 bytes
SHA-256: 74a786bb7c0031380477041adcc7b437b2115a8f9384ea64fce5dfcceb22d4d3
font_01_sfnt_off0000e1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C6 11160 bytes
SHA-256: 076602e6fe203b69153b2a281b4ee94cd351ea781c08185bb1581c2df0301678

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