Malicious PDF — malware analysis report

Static analysis result for SHA-256 befe9a039be52144…

MALICIOUS

PDF

79.3 KB Created: 2021-03-07 08:04:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: caa1544e6d5034478d8d5b07e4f40116 SHA-1: 02e4df0be8f323b8bc1c43c4fb99c9653cfc46f6 SHA-256: befe9a039be521445d517a62d798dda43c002844e05cda4c6e684c847fb609dc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a significant heuristic firing indicating it's a link farm on disposable hosting. One prominent URL, 'https://pelibifir.ru/strik?utm_term=the+last+exorcism+2020+cast', is directly associated with the malicious detection. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

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://pelibifir.ru/strik?utm_term=the+last+exorcism+2020+cast PDF link annotation
    • http://blaugrana.ru/arranged_marriage_book_downloadwjt46.pdfIn PDF document text
    • http://prizinsta.online/what_model_kindle_is_d011005wv4l.pdfIn PDF document text
    • http://premiumpornclips.com/kabubogizb9jo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387817/normal_5febda2a76b46.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/hygdrtK/12985856618.pdfIn PDF document text
    • https://cdn.sqhk.co/puwipaneke/ETijRge/xodesoxelanasasa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493873/normal_5fdc7d767bdc4.pdfIn PDF document text
    • https://cdn.sqhk.co/gabazumad/ihiivaI/best_video_chat_app_with_strangers_for_iphone.pdfIn PDF document text
    • http://tevfikyuce.xyz/free_download_quran_with_bangla_translationt70ve.pdfIn PDF document text
    • http://prodson.space/zotakewewiw4z1io.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://uploads.strikinglycdn.com/files/b7a1e528-a90c-401d-88f8-9332e48106e2/sasoz.pdfIn PDF document text
    • https://e6676b24-921d-4f57-8fca-beda98688f3c.filesusr.com/ugd/144d27_04f6368131dc4153bfe37ab5675be20b.pdf?index=trueIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_8ced345c92d943748b94b34022f26d5c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2e8daf7-4e00-4151-a4f1-800ef8739893/24689928489.pdfIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_4738401e9cb14bb3b8104d2132aec839.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/piradi/56940264707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1154e0d8-e684-4112-931a-586df57f7768/jisabagejuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca5ff776-7cf1-463f-9a2a-9e2ddd62745a/zalesit.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/vita_spa_l500_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/61784618901.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_off0000ed59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED59 5012 bytes
SHA-256: edbac94603c5761593f1e621d09b9a2ceb7e49ed1e89fc84a59909137ed4121d
font_01_sfnt_off0000fe5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5C 10424 bytes
SHA-256: bcbaf7686274ef25c00e8a13a28c686b194134e4e184a17b704225e1f66a1d1b
font_02_sfnt_off000121dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DC 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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