Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c1dd04616c2b93…

MALICIOUS

PDF

81.5 KB Created: 2021-01-22 02:20:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 42256097040955f37fb110337109cace SHA-1: b862a98a91906e39c1f5ae499a30e1ac38765648 SHA-256: b0c1dd04616c2b93a1a977cec05178c28e4d5add0cf881598f8590052f0e183c
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirector infrastructure or link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the primary attack pattern involves directing users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://gettraff.ru/123?utm_term=five+great+nations In PDF document text
    • https://cdn.sqhk.co/tobipamu/hejheKm/91409801353.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/deexsuY/zombie_ultimate_fighting_champions_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/eaoyhaw/adventure_communist_event_leaderboard.pdfIn PDF document text
    • https://site-1226757.mozfiles.com/files/1226757/pavikeratixijunitim.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/Bhchdif/6821209140.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/ggHjbFY/economist_intelligence_unit_country_reports_archive.pdfIn PDF document text
    • https://cdn.sqhk.co/ritapabinap/5FJooES/battlestar_galactica_triad_cards.pdfIn PDF document text
    • https://cdn.sqhk.co/kapudome/QhbIghR/kinegogexepox.pdfIn PDF document text
    • https://site-1246999.mozfiles.com/files/1246999/78704185928.pdfIn PDF document text
    • https://cdn.sqhk.co/xolafunodo/k5hd0gc/bijawekegitivo.pdfIn PDF document text
    • https://robesiladobaluj.weebly.com/uploads/1/3/0/8/130813577/7c9155d70.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/HjdjjYN/muwefiro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373753/normal_5fef8d582b499.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/jbvMjas/simplenote_kali_linux.pdfIn PDF document text
    • https://site-1174289.mozfiles.com/files/1174289/89659828356.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/geYigjb/43989657388.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/fXjc8hj/jejobepaxakis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371244/normal_60013b70914d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476780/normal_5fd2695ae1267.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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_off0000ea3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3A 3660 bytes
SHA-256: b08a07e12460216cdb130438f97f4f05726e3be810cf0bb656ad037c48f3ab1f
font_01_sfnt_off0000f748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF748 4624 bytes
SHA-256: a89a01b1cd2aaaea55f7be9bf67b17fb054150af74df1c8d380e91888db9c0a1
font_02_sfnt_off0001070d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070D 10208 bytes
SHA-256: 6b35cdb80ec604a19b91ae5a7770fa68b6030a3f6660dd1bcdac0405c265fd76
font_03_sfnt_off000129e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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