Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb718ca29bcce846…

MALICIOUS

PDF

82.2 KB Created: 2021-03-13 14:56:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0160bb713b89ba2fa644e14512cc7c39 SHA-1: e45516745f03fa2e72dd2dd39cc9d2ab2176089a SHA-256: bb718ca29bcce846a128ec251a696e64e5896af1a606e800985f0080346c15a3
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO poisoning tactic to distribute malware or phish users. The embedded content, though heavily obfuscated, likely serves as a lure to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://vilenefex.ru/wix?keyword=tiger+den+lounge+menu PDF link annotation
    • http://bewepovuzif.iblogger.org/14228578049.pdfIn PDF document text
    • http://werewov.22web.org/amyloid_peptide_formation.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/64626333733.pdfIn PDF document text
    • http://vutisonoj.sportsontheweb.net/27787784900.pdfIn PDF document text
    • http://vetobiz.sportsontheweb.net/canada_steel_exports_to_us.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/87687d31-0775-45fe-9505-0fef461d2683/proscan_plded3273a-b_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07036d9d-cfd4-454c-a48a-ff5ae2a21b05/mimimujakarodiworojid.pdfIn PDF document text
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_db3ea1eadd3d420cb1a7909010667df4.pdf?index=trueIn PDF document text
    • https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_78e107ad5f3d48739fc9e03a5b9dd3d3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b186c8c-0d85-4cfa-81ca-a3ab7387485d/load_order_guide_skyrim_xbox_one.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a674f304-506f-43b2-8ae5-d59458c6a1d0/51808337532.pdfIn PDF document text
    • https://9df6e0af-a028-4e88-91ba-61a1b37318d5.filesusr.com/ugd/7c1f05_48939bf83b984a21963ae4d2fa5581e7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd953bd2-233e-4cd3-a6b4-0795d67b25ba/96451718097.pdfIn PDF document text
    • http://doritiwenoxa.onlinewebshop.net/kafuxipugolozefaro.pdfIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_fd18560fafc94079b26e48b36c148ecd.pdf?index=trueIn PDF document text
    • http://jixojamut.epizy.com/blouse_silai_video.pdfIn PDF document text
    • http://kovawasokagi.epizy.com/8831087149.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f52c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52C 4704 bytes
SHA-256: 0beabe78b0270704bab79ce67a1d65df23d72144b4adf32d688d239e32f13233
font_01_sfnt_off00010519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10519 25324 bytes
SHA-256: da05bc340eafe71883ce267238b51c7a240b4a032b4ef7b2bb26d6b71a2f47e2

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