Malicious PDF — malware analysis report

Static analysis result for SHA-256 73676d41621178ed…

MALICIOUS

PDF

80.4 KB Created: 2021-03-14 03:19:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1faed38dcd62f3e183e76060528fe768 SHA-1: 16c2b0946a86658fe86ce0f85246c9d91e56a88b SHA-256: 73676d41621178ed899e5a77ae8b0683fbaa271971b5898266256508b395bd08
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=static+and+dynamic+website+examples PDF link annotation
    • http://tapozifokun.mywebcommunity.org/kokokufejunevezevebuna.pdfIn PDF document text
    • http://jefuvumerusew.getenjoyment.net/63261337957.pdfIn PDF document text
    • https://wexasubofuxumeb.weebly.com/uploads/1/3/2/7/132740188/aaa42a6cbac18f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444869/normal_6046cb9cad12f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488335/normal_6016e4ac325fe.pdfIn PDF document text
    • https://gakokoxexoboj.weebly.com/uploads/1/3/0/7/130776672/6eac9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_6022b0ef17e02.pdfIn PDF document text
    • https://dajilifu.weebly.com/uploads/1/3/4/8/134891154/9821885ca3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_96665c8dc28849a9857feae2441c3cbd.pdf?index=trueIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_fe14f595361a4c57ad791a96c7bfe507.pdf?index=trueIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_7001a141079344c9a79f6316da5f88d9.pdf?index=trueIn PDF document text
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_72dc7102a11d4eba864b4a1c58879215.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kotenu/48_laws_of_power_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/form_to_apply_for_passport_online.pdfIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_59c43ee56ccf48609e58ff54a74565b3.pdf?index=trueIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_10cfa5054f474245a37493a2d19a3148.pdf?index=trueIn 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_off0000f822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF822 5628 bytes
SHA-256: 9632c56a0c911e7a7266bb9aa7f20c21bee92118f98f276b3c1aa3e94b1ceddc
font_01_sfnt_off00010b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4C 12096 bytes
SHA-256: 5340949c35512aa1bf3745add27f8ec523837a7e306ef0eb59bb3540b0a67349

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