Malicious PDF — malware analysis report

Static analysis result for SHA-256 7178ed4b913aa8ac…

MALICIOUS

PDF

65.4 KB Created: 2020-11-30 09:32:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3d0147fc8a988fe8a39642c1fd77f023 SHA-1: 9114355dab8a22616f109fc46ca81eec97cbb87e SHA-256: 7178ed4b913aa8acefb4726166ea096117c3bcf40004ff08725b21069ac3ad4e
164 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 an urgency-based 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 0.9996

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=does+publix+drug+test+for+weed PDF link annotation
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/c8b9ed7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383586/normal_5fa1f1908bf7e.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/sosepazikodo-tolakilapagapoz-xuzukunixi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385028/normal_5f93c5d55c345.pdfIn PDF document text
    • https://botakukejase.weebly.com/uploads/1/3/4/6/134610266/fideditoxodonax.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/2c3301bd-5dff-458a-af6c-812aa01a06f8/pexopepadimodolefit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d104b7-a957-45f4-b8c4-ceb4f011d5f3/64458723984.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/electronics_mini_project_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b8de9a-5433-4c3d-9b56-ee3d9e374c0c/dragon_quest_heroes_2_character_crea.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f693779-51c4-48f8-850d-c0dde02a8211/23904184048.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_off0000c4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DD 5300 bytes
SHA-256: ab471ecbfd529c4d610cc93248cf5dc74f70d3f627030537e2c93eb1f890e4ea
font_01_sfnt_off0000d707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD707 10052 bytes
SHA-256: 063f84d83ea3e31a6ba06a7dfa464947be84e34c68d41905892ab026c4d8f189

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