Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e70f5c09689ca58…

MALICIOUS

PDF

62.1 KB Created: 2020-12-27 20:21:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dc46c6c66cecb6c14ca6040c12c7e2e SHA-1: 71d4ff52a7267dda837dcaf9363ffbb8a571288c SHA-256: 6e70f5c09689ca589f3e760b067c0fcdcc482e890ad5aef8e20c53d4c755badb
222 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and a machine learning classifier, indicating a phishing or malware distribution attempt. It contains numerous links to external PDF files, likely part of a link farm for SEO manipulation or to obscure malicious destinations. One critical finding is a link to known malicious redirector infrastructure, suggesting an attempt to deliver a second-stage payload or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/123?utm_term=fnaf+free+roam+apk+android
    • https://cdn-cms.f-static.net/uploads/4530937/normal_5fd7eb9d76f9a.pdf
    • https://fodoradesak.weebly.com/uploads/1/3/1/4/131454556/vakiliwolivaji-juwozupok.pdf
    • https://saferuwakuzav.weebly.com/uploads/1/3/4/6/134688645/096e763ce.pdf
    • https://cdn-cms.f-static.net/uploads/4385009/normal_5faa3d0322638.pdf
    • https://cdn.sqhk.co/vowibesep/difjd1i/12319854588.pdf
    • https://cdn-cms.f-static.net/uploads/4403534/normal_5f9fa0207d7cc.pdf
    • https://xotogulil.weebly.com/uploads/1/3/4/6/134655180/palesedapuwetik-lotokafelof-wimene-pogiw.pdf
    • https://cdn-cms.f-static.net/uploads/4403537/normal_5f937f4eb06c1.pdf
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/dbf724c.pdf
    • https://dibodowe.weebly.com/uploads/1/3/4/6/134686502/fexowipafazenege.pdf
    • https://cdn-cms.f-static.net/uploads/4421354/normal_5fa5301082aa3.pdf
    • https://cdn-cms.f-static.net/uploads/4381788/normal_5f8d07cb0b0df.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8c027246-9167-4737-889e-005cdadea9c0/budexilomiku.pdf
    • https://s3.amazonaws.com/jubiferekaka/adobe_photoshop_lightroom_4._0.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_off0000b52e.bin
ae09753896c89df805260d28afca962369a2d3a15e7625c79a1bf736d2c0e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB52E 4996 bytes
font_01_sfnt_off0000c61f.bin
0ce16e4b64e3a5dc250cb7fee443a68766f4eaff447521f0b0f83ad037ae2f22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC61F 10592 bytes

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