Malicious PDF — malware analysis report

Static analysis result for SHA-256 6730c17c9fca3dd4…

MALICIOUS

PDF

72.0 KB Created: 2020-12-22 21:41:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c33ee06ba21f4d3ebf2c4d0d30a0744 SHA-1: 44051c1b56efe80444d5d5d6a8addc3a5914040f SHA-256: 6730c17c9fca3dd44c3ef25798e3bbb24bbdd399684285ba64b1742758b201ce
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'Google analytics event report'. The presence of multiple external PDF links, including one to a known malicious redirector, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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?utm_term=google+analytics+event+report
    • https://cdn-cms.f-static.net/uploads/4489593/normal_5faacc618fa8d.pdf
    • https://fipaziditude.weebly.com/uploads/1/3/4/4/134465794/aa500454d.pdf
    • https://cdn-cms.f-static.net/uploads/4406463/normal_5f91d49625eb9.pdf
    • https://cdn-cms.f-static.net/uploads/4379602/normal_5f901793726d2.pdf
    • https://jojavofeze.weebly.com/uploads/1/3/4/3/134395471/3bdd866f89ddf6a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ca89fc80-74d9-4767-9366-ac699f2cad5b/cognitive_behavioral_therapy_workbook_for_depression.pdf
    • https://s3.amazonaws.com/xakapudakadu/74995569787.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf3073c02f22b9dd2821d/1606284040174/rozuvajolegabopotu.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf8cab7ee8e70759e37c8/1606219979047/acqua_di_parma_colonia_essenza_100ml.pdf
    • https://static1.squarespace.com/static/5fc56c853398ff75154c3188/t/5fd06a9acb6bfe602c5008d4/1607494298852/wordpress_ecommerce_templates_2020.pdf
    • https://static1.squarespace.com/static/5fdd2c3cb0b7d26d496ab432/t/5fdd942642c0045a33e83dba/1608356903722/xelowixesudejuxa.pdf
    • https://s3.amazonaws.com/tugumeb/place_value_chart_worksheets_ks1.pdf
    • https://static1.squarespace.com/static/5fc364a740f1034a5cb8cf86/t/5fcb2ed9b6b7366152f4a5bb/1607151321432/47407693515.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_off0000dc31.bin
e5dc941f65c647c738588f6ab08a3fba0802507e9ed06ef06b88febd4cd52f71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC31 5292 bytes
font_01_sfnt_off0000ee5d.bin
7507a7a640e31088835339338db6b255a54e2d9d6a7d9525451db1bdfa89467e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5D 10832 bytes

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