Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76f7124c3dde469…

MALICIOUS

PDF

68.2 KB Created: 2020-11-25 10:59:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2e3279cde1c3704c3bd04e75c7794b66 SHA-1: 2ca318aa9ef147110fe3005b8810210b4c523aa8 SHA-256: c76f7124c3dde469a408051aec4da33c2c9c6032cca07274cad3a2108d598b51
186 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. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/strik?utm_term=wolf+german+shepherd+puppies+for+sale+in+california PDF link annotation
    • https://dimomivij.weebly.com/uploads/1/3/4/5/134504604/temegovaposux.pdfIn PDF document text
    • https://diwefiramogepot.weebly.com/uploads/1/3/4/2/134265367/d94828b49c.pdfIn PDF document text
    • https://dowezepuxaku.weebly.com/uploads/1/3/4/4/134463959/4509b874.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/xalitawiwom.pdfIn PDF document text
    • https://tanutalavisa.weebly.com/uploads/1/3/4/0/134000413/nazonivatogilo_ruxiromalefa_xosufisof_devipijili.pdfIn PDF document text
    • https://gumopukuzi.weebly.com/uploads/1/3/4/4/134481114/pewajunabakirok_kejofoketi.pdfIn PDF document text
    • https://dofikusoru.weebly.com/uploads/1/3/4/4/134472045/sorevum.pdfIn PDF document text
    • https://gedejapel.weebly.com/uploads/1/3/4/3/134314995/9294791.pdfIn PDF document text
    • https://pinoxelu.weebly.com/uploads/1/3/4/1/134108818/zigijo-mudebepafo-libinurefop.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/c32fd61a-42d1-4806-a8d8-25ab799927ff/75898350125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd0486e-3e89-4c60-867b-3302b8dfa70a/east_greenwich_high_school_ranking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaf9daf1-e24f-4d6c-b4f6-76f7f717c516/covalent_bonding_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfdf85ec-da29-483d-b9c7-5400f46c44c4/weather_hourly_mechanicsburg_pa.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8F 5580 bytes
SHA-256: e700d281f6ae28616785a10fc2caac2088b43f74b68a8afd2530d3c4920e59f9
font_01_sfnt_off0000e170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE170 10108 bytes
SHA-256: 632391a49d33ca8e7dc076930c9b9423f6244ff36ddb9b58de9fe8e2ddffe73f

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