Malicious PDF — malware analysis report

Static analysis result for SHA-256 c29d2d24bcadff7e…

MALICIOUS

PDF

80.2 KB Created: 2021-04-21 21:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41afdc4cf09993c8df46577488cd291f SHA-1: 13493f1dcd94fa89f4a4742d68b1cf5d0b62565b SHA-256: c29d2d24bcadff7e64d3894e937a2807e603c97df047e2683afc26bc39dc0ad1
126 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'Walmart black friday tvs for sale' and embeds numerous external URIs, with one specifically identified as a potential phishing or malware distribution URL. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/strik?utm_term=walmart+black+friday+tvs+for+sale
    • https://lanoxujuzon.weebly.com/uploads/1/3/4/6/134630121/wupezajanopax_bazimipaba_kolidofozaresel_kipawizulo.pdf
    • http://rarurude.22web.org/codex_adeptus_astartes_deathwatch.pdf
    • https://fewebiporunivag.weebly.com/uploads/1/3/0/7/130775920/988332.pdf
    • http://vojituvidur.iblogger.org/dagizu.pdf
    • https://badosesidexezub.weebly.com/uploads/1/3/0/8/130874160/gifirapedeletetaxi.pdf
    • http://linodogeb.scienceontheweb.net/que_es_la_inteligencia_psicologica.pdf
    • http://wotukujis.sportsontheweb.net/92539194377.pdf
    • http://gegebafebofad.scienceontheweb.net/believe_in_yourself_murphy.pdf
    • https://fogufufizanalu.weebly.com/uploads/1/3/0/8/130813948/nejamox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://minepoziwa.epizy.com/house_plants_cacti_and_succulents.pdf
    • http://duronudisibap.rf.gd/bushcraft_uk.pdf
    • http://sasukagisodubex.onlinewebshop.net/tufugatebatajizipumoxuku.pdf
    • http://muvelexadaw.epizy.com/nafatepijorovuvudole.pdf
    • https://c63359c4-faa5-40af-ad11-254ddd3d100c.filesusr.com/ugd/838c33_d8e8a91b37ec41a19cf187315be7feba.pdf?index=true
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_423cf4e31ecd45ec865f11ff34d2fc8d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4909b19c-2171-4603-be2b-1a50d9cbf8bf/lock_pick_set_for_sale_pretoria.pdf
    • http://rigirulame.epizy.com/97602790200.pdf
    • https://uploads.strikinglycdn.com/files/207a02ef-b0ee-4ec2-b872-370c9320697d/siwokosulabawe.pdf
    • https://6974b9b2-fc2a-4e9b-9495-84ff65489eb7.filesusr.com/ugd/395280_cb975c04133b457a9e8ea70b7fc7ca4b.pdf?index=true
    • http://lemenoxubure.rf.gd/88813436344.pdf
    • https://uploads.strikinglycdn.com/files/13565dad-802b-493f-b26f-ac6c4d21214c/logic_puzzles_app_review.pdf
    • https://uploads.strikinglycdn.com/files/64b36595-6f76-4f1b-9ef5-120bc44621a7/tapesabu.pdf
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_319d255588d3414fb9ebe0d666a0ec05.pdf?index=true
    • http://lumulexidavotaj.epizy.com/47174512080.pdf
    • https://uploads.strikinglycdn.com/files/a5578c20-64b2-4ed2-8b41-c95d72070137/gojipigokinozodumaf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa2a.bin
9fc04e37e0f1073a03b48a41f8fb716d847e2397934057a1a5702f48545591d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2A 5548 bytes
font_01_sfnt_off00010d09.bin
2a7ce7570fbc7bdbc7417302dd01e2b44e88306d2bf65ea577d7cff8a964aa30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D09 11220 bytes

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