Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d45772362ea220c…

MALICIOUS

PDF

88.0 KB Created: 2020-11-17 18:52:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 85050da46da6977d25c02e695f304a9c SHA-1: dabb633d1bac3eb5eae5c813b4c63253ab7b6124 SHA-256: 4d45772362ea220c104512703dea1254781623c627a17c5bb365c2a25a84f142
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 0.9997

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
  • 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://trafficel.ru/strik?utm_term=gta+5+cheats+for+xbox+360+unlimited+money PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377717/normal_5f9059e30816f.pdfIn PDF document text
    • https://pawuzoratifeze.weebly.com/uploads/1/3/4/4/134471058/zatanizilosukuxifu.pdfIn PDF document text
    • https://kigivalivago.weebly.com/uploads/1/3/4/3/134337689/1597184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_5f8d1b803415b.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/dotejixalawowu-marefo-zufok-magaduviluka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/18886374655.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/mojilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa756aff-2191-47cb-ac52-e1eb87dac920/kiruja.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/44681299331.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/72194132534.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/tutoligirigikadibubuxevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a00536d1-a270-4895-8cf5-2692fdabe2c0/xaritefagarejefuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffee2f5f-115d-4cb4-9fc5-a289ab82420e/btd_battles_comprehensive_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/david_taylor_apostle_jail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a57d1a0-8097-4348-86d2-4b8190c3da7e/lomemajasaboronadefutataz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B10 6068 bytes
SHA-256: 4ebacae18abecbba6a2066a78d3c3e2a8c869ab6f0f77e64408798358600f874
font_01_sfnt_off00011f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F95 10888 bytes
SHA-256: 998df0dd190627bcb71c39a32727e24b86c4fcc43b179040fe5fc0a4136dd125
font_02_sfnt_off000144c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144C5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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