Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45106ee0991b41b…

MALICIOUS

PDF

70.2 KB Created: 2021-01-05 20:50:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: db3fd26e944ce3f09af0e4e55c2de0f5 SHA-1: de5260a80b273c54c593fe0d3a0f11a86083a5e0 SHA-256: e45106ee0991b41b36add83fcdbd1b734e7b19d3d3cb14accc8f57a660945b62
262 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file exhibits malicious characteristics, including links to known malicious redirectors and a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The presence of a 'download button' lure and instructions for a password-protected archive further indicate a phishing or malware distribution scheme. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ggtraff.ru/123?utm_term=cleanmymac+activation+number+generator In PDF document text
    • https://cdn.sqhk.co/mujekesire/8Ko2hjc/gatupowa.pdfIn PDF document text
    • https://cdn.sqhk.co/jenetuwuda/jjhjihW/10831320887.pdfIn PDF document text
    • https://cdn.sqhk.co/kitijorawul/jdjiPtG/best_tuner_for_6._0_powerstroke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466165/normal_5fb6d95698215.pdfIn PDF document text
    • https://pazudafodimaje.weebly.com/uploads/1/3/0/7/130776249/xofiferupisoguve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462362/normal_5fd3dbfe9fe29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444638/normal_5fbe908f3cb95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499283/normal_5fdd5ded35cea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d0fa8c8-b50b-4e53-84ac-ede09e8bc743/lurinorokapezamixadeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1272641-6964-48ff-b15f-57526d6ffa91/4278676821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48e5ccf6-c9e8-4834-9d15-18b5bc42e582/acer_17_inch_laptop_bag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6110414e-6468-4c31-a9ab-016baf0054de/bojepofab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1f60eb9-1ccd-4af7-bc3d-938ae8806eb3/t_handle_allen_wrench_holder.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_off0000d716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD716 5148 bytes
SHA-256: 37760bb9287603ad643fe0e476b1dc0f81656dd07ee348c82b06930271ccca6b
font_01_sfnt_off0000e891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE891 10508 bytes
SHA-256: 72926e2f2077ceeb40a6ddae832b97e5d17c78245547cc605375a9f011a89613

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