Malicious PDF — malware analysis report

Static analysis result for SHA-256 10805938969ae117…

MALICIOUS

PDF

76.8 KB Created: 2021-02-21 21:51:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d3db19fc854b73ba3c8ec4c5f79ba0f3 SHA-1: d09d5435b0a8193d253f1d6ffcb412186c06e6f5 SHA-256: 10805938969ae117a13b06b483a9d9db1746c6e223f6de1fb33140ce862fb90d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics, including ClamAV and an ML classifier. It contains a large number of external links, suggesting a link farm or distribution mechanism. The embedded content, though heavily obfuscated, appears to be part of a lure, possibly related to search engine optimization or content stuffing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://crophysi.ru/123?utm_term=ikea+malm+bed+instructions+video PDF link annotation
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/7653228.pdfIn PDF document text
    • https://cdn.sqhk.co/sofizagumup/fMigQdd/zizutu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387589/normal_5fd7f84b97add.pdfIn PDF document text
    • https://polovetanofup.weebly.com/uploads/1/3/5/3/135330247/4b6c6545a1e5.pdfIn PDF document text
    • https://cdn.sqhk.co/jekidase/8fShcjc/xinawugopupifegu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376105/normal_5fdec469332b4.pdfIn PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/hfihSUw/planet_waves_eclipse_tuner_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445104/normal_5fe0ebde7ba0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444371/normal_60328e86d6c63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452850/normal_5fd77b7dacdc4.pdfIn PDF document text
    • https://nupigefaxobabu.weebly.com/uploads/1/3/1/0/131070289/9951950.pdfIn PDF document text
    • https://cdn.sqhk.co/wamiratena/9jaVii4/clash_of_clans_base_th8_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/wemitupu/gjQghRL/bumasetowidudere.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489835/normal_60014684da2b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407313/normal_5fd7d45f4bf19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB20 2968 bytes
SHA-256: afcae459a23cd8fad60e71fa482ed795063b178ca7a96d5a337757ed3e51a98b
font_01_sfnt_off0000e5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C6 5288 bytes
SHA-256: e51a1d8cca1f04c7f762ba78bf9d3fa84b9532e62ab633ea2afb8c7271ee87b8
font_02_sfnt_off0000f7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A7 1936 bytes
SHA-256: 246569b5fd7226bd0ebf3c016de7ba0bf82e996896d660a08030b2af0a08efd3
font_03_sfnt_off000100e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E8 10648 bytes
SHA-256: 419635e7151651411bafda7da57a129cf9cd29c4fe9ca3b9c394a172824c831f

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