Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fabe89fdd9ea3f0…

MALICIOUS

PDF

85.9 KB Created: 2021-01-15 15:48:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 41e7611ec8b2cf80a22d087293d57ae6 SHA-1: 3805c8c02b097e2b4b3e0db6afdd22f409c48d55 SHA-256: 8fabe89fdd9ea3f01c39da7ca18567ca9540a9860bc03d8355f569aadb747033
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to distribute traffic. One of the embedded URLs, 'https://traffine.ru/aws?utm_term=activators+and+deactivators+of+enzymes+pdf', is identified as a malicious redirector. The file's structure and the presence of numerous links suggest an attempt to lure users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=activators+and+deactivators+of+enzymes+pdf In PDF document text
    • https://site-1174676.mozfiles.com/files/1174676/hyponatremia_correction_guidelines.pdfIn PDF document text
    • https://denepuwukofakar.weebly.com/uploads/1/3/4/3/134316944/334137.pdfIn PDF document text
    • https://site-1188419.mozfiles.com/files/1188419/mexizexiwiturut.pdfIn PDF document text
    • https://puxezemugip.weebly.com/uploads/1/3/4/3/134311794/6105387b78.pdfIn PDF document text
    • https://nurosizakudagag.weebly.com/uploads/1/3/4/6/134699554/dijanegebitipe.pdfIn PDF document text
    • https://site-1180756.mozfiles.com/files/1180756/vewuvazonex.pdfIn PDF document text
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/b99c22.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/8438231.pdfIn PDF document text
    • https://votumojelobi.weebly.com/uploads/1/3/4/8/134848055/busosusafikide-kutik-bumunevixa.pdfIn PDF document text
    • https://dovomarolod.weebly.com/uploads/1/3/0/9/130969455/8558d.pdfIn PDF document text
    • https://site-1177942.mozfiles.com/files/1177942/24119711447.pdfIn PDF document text
    • https://site-1172565.mozfiles.com/files/1172565/galaxy_shoot_alien_attack_space_shooter_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375698/normal_5fc3e63fa644d.pdfIn PDF document text
    • https://rugilebeme.weebly.com/uploads/1/3/1/3/131380811/sefijekiz_masatonovalox_jabubebu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/bully_game_free_for_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/16464873983.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001107c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107C 5468 bytes
SHA-256: 82c2fc21669fe022899a321ef2b7dd8d3f19fd6611c5bf0c0f73f0c89c5c2bf7
font_01_sfnt_off0001231c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231C 11432 bytes
SHA-256: d9a6fb2c800e0d4698536b701565d5baae27d9ac447667dafc01c4907aae0e14

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