Malicious PDF — malware analysis report

Static analysis result for SHA-256 3488e6022595ebca…

MALICIOUS

PDF

72.4 KB Created: 2020-11-27 18:07:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ef04b5abca8e1baa66bf7e24fe273a9a SHA-1: 321e73d27bbe7bbde77d5dafecfe67c7f745a1c1 SHA-256: 3488e6022595ebca7f54f93e207bb8f35dd1b9778b015afcd923f433194687a8
216 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are part of a link farm designed to attract users searching for software downloads. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicate malicious intent. The document also includes a lure for a password-protected archive, suggesting a multi-stage attack where the password is provided to decrypt a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://trafffi.ru/strik?utm_term=pokemon+y+rom+apk+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419820/normal_5fa126caa4059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413108/normal_5fa0caeda016f.pdfIn PDF document text
    • https://tadiselugel.weebly.com/uploads/1/3/4/5/134589133/xalavatotiguku-zibuderezutur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488335/normal_5fa93ef3122fa.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
    • https://uploads.strikinglycdn.com/files/5e330c09-c1c9-4c3f-8e4b-ad41710421bf/wasukeno.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/kudefepevotazotomoviga.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/jopetilitexebisinekubule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab3ea765-b145-4d4d-bd9e-5494839d242e/mitosis_onion_root_tip_activity_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4c197b7-0168-4798-8718-31e5f2faba50/11763789501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be32e7b0-1bd2-4fc0-9c09-fe8aa0ef99fd/tefaj.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/81556513489.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/25659086716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06f9283-1999-4fa0-96a9-b8b3cf41b753/87841558968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7070dfcf-7f09-4c09-a73d-1e7959713da8/28048071384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99075cbe-f582-4a10-9093-fe87c0b571ac/63700576219.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D5 4844 bytes
SHA-256: 4ce9c681ab8d245ca4d7825d4e9b8b68079f2744f61cde6a3c0f255b55e42650
font_01_sfnt_off0000e138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE138 11132 bytes
SHA-256: 17770416954f11db7411eca8838316a50d49e8384b73b7ab6786a2fd197a0f2e
font_02_sfnt_off00010670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10670 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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