Malicious PDF — malware analysis report

Static analysis result for SHA-256 074d90275a89dc46…

MALICIOUS

PDF

68.8 KB Created: 2021-03-31 07:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2adc1d99eab7c607c3746084478fae77 SHA-1: d6a6cb0c2bff858da4517cebe189cc79bcf6a43e SHA-256: 074d90275a89dc4693f5837d82385f11d3c1d68135528f15d22164c8332a0e99
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 0.9996

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://vilenefex.ru/wix?keyword=ghoulia+yelps+first+wave PDF link annotation
    • https://fujikoxeloto.weebly.com/uploads/1/3/5/3/135307408/1a3b2.pdfIn PDF document text
    • http://xitemomide.22web.org/58024970136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481270/normal_601bf8f8e5c3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470836/normal_60488b163d43a.pdfIn PDF document text
    • https://gudetopop.weebly.com/uploads/1/3/0/9/130969639/337bdccf40b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491436/normal_5fd2e81182ea1.pdfIn PDF document text
    • https://dorinupunariwuw.weebly.com/uploads/1/3/4/7/134716439/622876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483604/normal_60240c6f0429d.pdfIn PDF document text
    • http://bewelaxoludiw.22web.org/arduino_tutorial_24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_6024270a8a60e.pdfIn PDF document text
    • http://fogugunij.iblogger.org/risk_factors_for_acute_coronary_syndrome.pdfIn PDF document text
    • http://jumovuv.22web.org/ameristar_warranty_information.pdfIn PDF document text
    • https://forugizatufuru.weebly.com/uploads/1/3/1/4/131410167/6923793.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://warulutidodaluv.epizy.com/like_water_for_chocolate_def.pdfIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_1884c24972b2461794f22a90f5005db7.pdf?index=trueIn PDF document text
    • http://sedobuxekazadi.rf.gd/uefa_champions_league_2019_games.pdfIn PDF document text
    • http://fawipiro.rf.gd/performance_appraisal_form_sample_answers.pdfIn PDF document text
    • http://wuxipuretox.rf.gd/18087553260.pdfIn PDF document text
    • https://d0f5cf02-e55f-42e7-ba97-8a4d5a2b8368.filesusr.com/ugd/7f59a0_4085a686a4ed4aab9056bea554a0f6ba.pdf?index=trueIn PDF document text
    • http://sakikuzugodo.rf.gd/5005709164.pdfIn PDF document text
    • http://jawedujap.rf.gd/41896937857.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_off0000cd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7C 5276 bytes
SHA-256: 07b5b520bcc714c16e36141158fbf7e7813619f9e0c26392679f1b365b82b10b
font_01_sfnt_off0000df8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8A 11200 bytes
SHA-256: cb3fc320d303b0ad93f192ffac03d3497a28462f40d716198d4bb2cb7da1cff8

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