Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba36184ae142eef9…

MALICIOUS

PDF

91.7 KB Created: 2020-12-30 19:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46c4dc0ec3b0294a4d1f2bd991b8a4a5 SHA-1: da1968b510dbfce6d555c4cc35884f4a724ec17e SHA-256: ba36184ae142eef9b6d04afd28c8115339dfc1d6bd85621c1c207dc69e7d4e11
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic confirms the document's content is designed to trick users into a fraudulent scheme, likely involving a fake lottery or prize. The presence of numerous external links, including a 'PDF link farm', suggests an attempt to redirect users to malicious websites or further phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://traffset.ru/strik?utm_term=programming+languages+popularity+2020+github
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/tefidasixenabi.pdf
    • https://cdn.sqhk.co/ruzewekafan/iajcp7W/navoba.pdf
    • https://tizonitiwu.weebly.com/uploads/1/3/4/7/134734793/jelafipo_gakulorevero.pdf
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/mutavujinob.pdf
    • https://cdn-cms.f-static.net/uploads/4480389/normal_5fd6fec7de8c9.pdf
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5f95c2d09baa2.pdf
    • https://cdn.sqhk.co/xaxovowupofa/TT4ibhc/easy_chocolate_icing_without_butter.pdf
    • https://cdn-cms.f-static.net/uploads/4482631/normal_5fdb6db667ce0.pdf
    • https://cdn-cms.f-static.net/uploads/4427085/normal_5fd9a830cf564.pdf
    • https://cdn.sqhk.co/zofukumane/sWiiVjg/39253721218.pdf
    • https://cdn.sqhk.co/nakolore/iYHgfhh/65430282071.pdf
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5fbe35e765346.pdf
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/xixidiwisosojo.pdf
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5fc1a47ea71b2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zedudo/41785617605.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00013f77.bin
44a00592c9206ebd6a8ee9593933d1b56025ee2f6390a322622328f855079b88		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13F77 20132 bytes
font_00_sfnt_off000102a7.bin
40ac0745e2cd48321ffb7d75c2f30a0694f8b1e9b6033f32a691fb0d0d31caa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102A7 5752 bytes
font_01_sfnt_off00011614.bin
346bfd519586b73816c2915651a97a89657213c4547911a89d7529710f4fd8c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11614 11992 bytes

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