Malicious PDF — malware analysis report

Static analysis result for SHA-256 463d032cd9b8ad54…

MALICIOUS

PDF

97.3 KB Created: 2020-11-13 12:46:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d2810a2cb535b852ee71d4c4ba77e0a7 SHA-1: 6f36213a8c0f99ed02cfb5530692994329ed173e SHA-256: 463d032cd9b8ad5403beadc04bba3aec039ac6214f28c7d605bf736463ae3da0
234 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 document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/strik?utm_term=the+magnificent+ambersons+criterion In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414164/normal_5f998bba81692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449600/normal_5fac32969a540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f9f55647df66.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/f02d87204da67.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/46137bd7-c869-4c9c-818c-6c62e951c375/tagomimerasezavuwej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c33cac-8745-4b79-880f-f2adaab6ca60/husqvarna_automatic_sewing_machine_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a9d4a94-c64b-43ed-9590-7e8a7c10c6ef/best_slime_recipe_without_borax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e310f6e-94bb-4ff6-b49a-317aec541385/sixebazadozogusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef3e8fbd-fbe1-4c2f-8c78-4aee0e46bf04/explosion_of_rot_pathfinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1841db2-8f29-4026-8e6a-cbc4552a56e3/business_intelligence_and_analytics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb9d95c1-9670-4dcd-aef7-8433813fdb46/8138812697.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1274d541-de18-4fcd-bf50-1508f5cbe6ee/basuxikavadomoporumiva.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_off000141d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141D0 5352 bytes
SHA-256: 018af9c939f42bec24d686626c5c24519f33556468716904b34e23513db0fb75
font_01_sfnt_off000153db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153DB 10700 bytes
SHA-256: 8df177acd056411ea7ae46acfc0890bec71379c498a4c7e29a6773dd4491e02c

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