Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5da2c0442b2dc4f…

MALICIOUS

PDF

105.4 KB Created: 2021-06-06 01:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ad92b4c34a1a529cef08a937b7be5484 SHA-1: aa9c573dd524cde8a47c1f69ea50a0d4d5a9edc7 SHA-256: c5da2c0442b2dc4ffab47d2dac5bdd95fb82d35a24ca50955c825d458c54b1e5
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, contains terms like 'Cognos active reports tutorial' and 'account will be terminated', which are likely lures to encourage clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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
  • 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/123?utm_term=cognos+active+reports+tutorial PDF link annotation
    • https://wibixebaroz.weebly.com/uploads/1/3/1/8/131856543/e3f3e12944b9.pdfIn PDF document text
    • https://duzaguzu.weebly.com/uploads/1/3/1/4/131406181/kejiwidadoduwagose.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460954/normal_6007e518b2e68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495997/normal_606e87769d039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489730/normal_6044cadbbcc4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407087/normal_6004c34f8e715.pdfIn PDF document text
    • https://wepesinojaru.weebly.com/uploads/1/3/2/3/132303052/jijifudowo-zevazolewim-gafovulitivin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365635/normal_5ff42898dfb49.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://figuduvimeti.pbworks.com/w/file/fetch/144510594/85533533751.pdfIn PDF document text
    • http://wenuveraroto.pbworks.com/f/37829010420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/062c068c-b001-419b-9e52-4d459713993f/gimaluvupazeseponuk.pdfIn PDF document text
    • http://katafuzum.pbworks.com/f/19119095294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bfbd1d3-c098-450b-a9e5-d65b258c929f/zapowofupek.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/how_to_value_charizard_pokemon_card.pdfIn PDF document text
    • http://labidan.pbworks.com/f/bobumifekugufog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/186abadc-81c4-43c9-a675-7cd79213f473/midofapawixave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfd2bfe2-754f-4151-8ec7-ccad7090c3c3/18095770580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b7c7b10-466c-4882-b25e-9fe33ed8e58a/2015_jeep_patriot_owners_manual.pdfIn PDF document text
    • http://pebokuvog.pbworks.com/f/compustar_pro_t12_manual.pdfIn PDF document text
    • http://mujusevo.pbworks.com/f/dewurakaxudidi.pdfIn PDF document text
    • http://demopefo.pbworks.com/w/file/fetch/144528582/how_many_cups_is_32_ounces_of_cream_cheese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4278e66-6f4f-4d20-b1b7-d50f0f3550ba/79428588129.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_off00015c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C2A 5064 bytes
SHA-256: 27c9b432f88aa63fc954947e56763712a7b1d897cd29b097b939ff78bbfb3658
font_01_sfnt_off00016d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D81 12396 bytes
SHA-256: 1d150dab01c49de006d1c23c75398c9b413d5289f628207879a47432489df623