Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c68863a35afee0…

MALICIOUS

PDF

73.7 KB Created: 2020-12-21 07:55:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2a319f93b4be2b8a79af9d9bca649666 SHA-1: 0edfdb2510773d0a5a3cae5eceb8fc04c0bd0667 SHA-256: f2c68863a35afee08733133c0631c53f20fa7fa5c23e381b481505bc50d0ff54
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://gettraff.ru/123?utm_term=fnaf+on+mac In PDF document text
    • https://cdn-cms.f-static.net/uploads/4485010/normal_5fb4dcd06c93b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371265/normal_5fca853e64d53.pdfIn PDF document text
    • https://disinuxokisukoz.weebly.com/uploads/1/3/4/6/134610262/vuvuxadukose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481819/normal_5fd95e5bb5f49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5fa7b2ed03ce4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5f8fae0c09c03.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fde7b11617c13787ca3ef9c/t/5fdf760915a11837d0ba5f73/1608480266163/kekozoluvito.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50e7aff13940aa25a4d24/t/5fd644c6226e9048fab26ebc/1607877830346/motu_patlu_cartoon_full_hd_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/zuloturobizajuluw.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/bermudan_swaption_term_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6a51f6-4355-459e-ace1-505dec3c93c8/star_wars_battlefront_2_ultimate_pack_install.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF2 4676 bytes
SHA-256: a38a5c3205a58d20621ab61d50fc1ca8a35f76728eec4c19ada81c9b13b37a57
font_01_sfnt_off0000ded5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED5 11628 bytes
SHA-256: 5a5bcf04c67c3627cdc3f80340b500bf987beb66a6ded3b29df6c4154a422571
font_02_sfnt_off0001052e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052E 16288 bytes
SHA-256: ef0fe5e4c3df87daa3c22f420b1c38346ade548d775f49ca8892d494fcc58392

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