Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aba6d27e0ccd95f…

MALICIOUS

PDF

98.0 KB Created: 2021-04-27 04:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 77eb62a156ec8a2e0f277a1442ef185c SHA-1: 689061bd061df0d4138144c15ff34c08f2832bfc SHA-256: 5aba6d27e0ccd95fce92765236926bddeec2941252f3ed9dcbaf6a72535513bf
126 Risk Score

Malware Insights

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

The PDF file contains a URL that is part of a link farm hosted on disposable domains, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. Although no scripts were explicitly extracted, the PDF structure and external URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/strik?utm_term=how+to+install+kallax+inserts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465136/normal_603ae63260c13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405925/normal_602ff00449c1a.pdfIn PDF document text
    • http://vibemezanolex.mypressonline.com/jetubofunamigusijepa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412599/normal_5fc6f403d48bd.pdfIn PDF document text
    • http://wuroguredogir.getenjoyment.net/11th_botany_practical_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_60580c16b2a0a.pdfIn PDF document text
    • http://tokepubex.getenjoyment.net/93731380927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449783/normal_6031d7fef1e2b.pdfIn PDF document text
    • http://fasadi.site/zigunububironapovamiwawexdoaj.pdfIn PDF document text
    • http://makeyourself.xyz/speak_now_3_workbook_answer_keyd4fws.pdfIn PDF document text
    • http://card2card.live/what_are_good_interview_questions_for_the_interviewernfij6.pdfIn PDF document text
    • http://rrrrkkkkk.space/7051351650u4twn.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/94c5096d-0bb6-406f-b046-cda800a569dd/how_to_repair_the_magnetic_resistance_for_exercise_bikes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77e51e1f-c9de-41fa-b666-34b5bddf2d32/ziwegetiviw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2075a8e-b173-4654-bb0d-d407bc9d9d31/joyce_meyer_battlefield_of_the_mind_audio_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eedcabe-dd54-462e-89d2-ae3832cc9bff/how_to_apply_car_stickers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/883b3130-bec5-4951-bd40-6278fedd129b/buwilukitovolatafimesubix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94955461-25f8-49df-8ca8-0d2fe89b87ec/17854195444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8333cba3-b564-421a-836a-243017ded947/65258593321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46e3dd7b-00c5-41d2-b0c2-5bfb8ac38a71/how_to_pray_for_a_cheating_spouse.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_off00012ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE4 4652 bytes
SHA-256: 56483484222918ef983cd516e1704d42f3194175df03de4af5b258f6adff7b0b
font_01_sfnt_off00013ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EBC 13700 bytes
SHA-256: 42a67b012bef0e3ac06eb3bed42bfb2347a038fcb2323a5226f6b6b9ca6ea86c
font_02_sfnt_off00016c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C3E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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