Malicious PDF — malware analysis report

Static analysis result for SHA-256 55eb2979891739bf…

MALICIOUS

PDF

92.6 KB Created: 2021-03-20 01:22:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 299589e7a40f9592e46d3fc6d5fc8234 SHA-1: b9d550aa35282b38b6baf545f977d407257743c8 SHA-256: 55eb2979891739bfd3489ab8ed894b9e08f60b85224719ccab315544d55cd509
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan, and an ML classifier indicating maliciousness with high probability. The document leverages a link farm strategy with numerous disposable domains, suggesting an attempt to distribute further malicious content or phishing pages. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://ponafet.ru/123?utm_term=free+customer+contact+list+template PDF link annotation
    • https://wuwosafojopog.weebly.com/uploads/1/3/1/4/131407683/nopozanetifix.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/gagosiwutorurijuv.pdfIn PDF document text
    • http://letinebab.mywebcommunity.org/countries_in_the_world_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380405/normal_604da2d88949f.pdfIn PDF document text
    • https://cdn.sqhk.co/puzukebejas/10jcXD9/best_tower_defense_strategy_games_for_android.pdfIn PDF document text
    • https://vosanuxavuzom.weebly.com/uploads/1/3/6/0/136089669/9643987.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/jfHp7jh/zumakujarodujipazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406481/normal_5fd7828096772.pdfIn PDF document text
    • https://cdn.sqhk.co/rogekanus/XjgQgjo/piriformis_function_in_hip_flexion.pdfIn PDF document text
    • https://mopamosaxute.weebly.com/uploads/1/3/5/3/135322262/newaginuguj.pdfIn PDF document text
    • https://xixezowipena.weebly.com/uploads/1/3/5/3/135341666/3d269492e.pdfIn PDF document text
    • https://gerexogevi.weebly.com/uploads/1/3/4/4/134463414/2f6bbe.pdfIn PDF document text
    • https://cdn.sqhk.co/setewefasari/LMihbCD/vepaxiwosagi.pdfIn PDF document text
    • https://cdn.sqhk.co/lopokevofoti/gMdMgcr/58059936042.pdfIn PDF document text
    • https://cdn.sqhk.co/mugegiduveb/8Gbgj00/fireboy_and_watergirl_crystal_temple_unblocked_games_66.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/ea56c2ad-6186-4235-8026-062c65d70b48/guy_who_invented_pet_rock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c3c1a28-58ef-40ae-b3d6-e7578d16268e/walmart_store_hours_christmas_eve_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3de03154-3799-4bf9-83e6-5e25203881b6/mopidukajebobirof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc3911c-7220-42f9-8322-90467e0c17aa/662677460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34061b82-3a4b-4eff-ad23-49c6218ed9da/62858007796.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_off00012d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D25 5032 bytes
SHA-256: 5891d4525793bc28597115fa751f5b7ba548d8916557290721d5890d9e2e16f4
font_01_sfnt_off00013e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E2F 11652 bytes
SHA-256: 58b704fa5a46bd5603e021432ee0edad6e3df5f3cd3d083f06b7147113f3303a

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