Malicious PDF — malware analysis report

Static analysis result for SHA-256 93968792ced94a3c…

MALICIOUS

PDF

70.5 KB Created: 2020-11-29 22:55:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f9264d1c7fcdc92204c25ea4313ff30d SHA-1: 431b016cca7e0c4e277e27318d13c2f5cdce27c3 SHA-256: 93968792ced94a3ce7ec4c2d5527d1dddd544679d77608dd14932139bc8ed176
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/aws?utm_term=louisiana+state+trooper+reports PDF link annotation
    • https://revibafejinaj.weebly.com/uploads/1/3/4/4/134485322/saligoxonowonukat.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/bewomo.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/9690232.pdfIn PDF document text
    • https://miniroworopan.weebly.com/uploads/1/3/4/4/134444940/2658368.pdfIn PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/sawarasoj.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/cd0c90db-d83e-4c09-9357-e1860933c9f9/butuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9120e3cc-a7d2-449f-b798-d925f419e489/basic_animal_nutrition_and_feeding_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee672e5-af0b-4643-a7a2-3088c29eead0/dd_3.5_call_lightning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a346bc28-1c2e-49a4-adfe-592ba890aff8/nba_live_mobile_cheats_hack_tool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/815bbaa1-0263-4133-a4b6-abd5d6d91bf0/ruxur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/726f08fe-4aa3-4ddd-a78e-7020248c43f3/gafazajog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e232dac1-8a13-43b4-a473-b930ec95f20a/sleeping_dogs_fastest_car.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed3e3445-f4b6-4ec3-b47d-073cb1e9e8b7/42627864723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cce3818d-4d39-4ff0-a0c2-69eaa53ea01b/federalist_and_anti_federalist_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/beehive_answer_book.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_off0000d722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD722 4724 bytes
SHA-256: 7602082c838e016606b496fc6cf9adc6a913a7683ec21517b393d61beb6eb09e
font_01_sfnt_off0000e741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE741 11376 bytes
SHA-256: 1aa49ec2d0a823fad5f3647cfb48132eaa92379ebe649caeb90b7d820826bdf8

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