Malicious PDF — malware analysis report

Static analysis result for SHA-256 a258ee2cc4ac3b51…

MALICIOUS

PDF

66.9 KB Created: 2020-11-10 11:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 138687fe3bfc0b58a4bfd8dd6ba6534b SHA-1: 938577f50b7c70e417b4f05a78b0b259816086dd SHA-256: a258ee2cc4ac3b51d44f735cff393ec49e04a0615d85566cc09f0728aa124e6b
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, specifically as a phishing trojan. It contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. The embedded content, though heavily obfuscated, likely serves as a lure to trick users into clicking the malicious link, which is a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/aws?keyword=public+law+97-280+oct+4+1982
    • https://zunuduzeguw.weebly.com/uploads/1/3/4/3/134344012/zuwabu.pdf
    • https://tajuweselu.weebly.com/uploads/1/3/4/3/134362517/f14cd3.pdf
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5f8e240cf0a26.pdf
    • https://cdn-cms.f-static.net/uploads/4411915/normal_5f94a7af71e83.pdf
    • https://cdn-cms.f-static.net/uploads/4419451/normal_5fa1ccacd552f.pdf
    • https://geroguvipem.weebly.com/uploads/1/3/4/4/134465684/zokufuvesulovexeton.pdf
    • https://zagukosi.weebly.com/uploads/1/3/4/3/134314994/meteb-kubapu-gewudesore-wilonobigamasat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pexodugosa/kaxodepuxuzasivufir.pdf
    • https://uploads.strikinglycdn.com/files/a5e33f4b-c836-4c99-a76c-bb8d7d5c586e/89993416497.pdf
    • https://uploads.strikinglycdn.com/files/2eecad40-ee34-4c4c-94bb-12f141e041dc/99646289169.pdf
    • https://uploads.strikinglycdn.com/files/2e43af70-0723-4c6a-ab8c-d622d3689f65/52661504883.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c90b.bin
3afd4c6b5070cdf9d123f61b544453cb2b9d45ffd59e43d40a0fd17a97defb1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC90B 5628 bytes
font_01_sfnt_off0000dc78.bin
77959e301f495ce1f33307880b2a6af2ebcdf46dcc19b4103b9c4528d40a8da5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC78 10136 bytes

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