Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7790c9dcf770cfc…

MALICIOUS

PDF

74.7 KB Created: 2020-12-17 19:03:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: df18ed17a30f197341c3711266b5c6bd SHA-1: bcca04c888796b3907a7bfb4a897b6daff180115 SHA-256: f7790c9dcf770cfc475501b88c7dfbc8dc25852603a88552699088888043410c
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'traffine.ru'. The document body, though heavily obfuscated, contains text suggesting a lure for a "free real money generator". The ML classifier also strongly flagged this PDF as malicious. The primary attack vector is likely spearphishing attachment, with the embedded link serving as the payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffine.ru/123?utm_term=free+real+money+generator In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412382/normal_5f95233726471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408324/normal_5fbd96ca1df6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459784/normal_5fc8652818174.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://s3.amazonaws.com/wifukedot/84878247256.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/nifilot.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/surgi_snuggly_sizing.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/gipezurefutirezagataka.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/aria_of_sorrow_randomizer_tracker.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/conan_exiles_aloe_soup_recipe.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/lagu_dj_kartonyono_medot_janji.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/google_maps_english.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/37559827572.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_off0000dba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA7 4624 bytes
SHA-256: 831e4836cf15eca8f726e006faef22cc955f6a808cf576aa0b4b370cd24df0c9
font_01_sfnt_off0000eb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB49 10760 bytes
SHA-256: 4378060bf1470180fc1dbe31e29a1277e33984c53d1112444ffcc41e1ad1e0cd
font_02_sfnt_off00010fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE1 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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