Malicious PDF — malware analysis report

Static analysis result for SHA-256 86708a6fb6daa442…

MALICIOUS

PDF

76.7 KB Created: 2021-03-18 11:32:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c7e3a12964abda49aa25199c084509d6 SHA-1: 65915ee2482450294606b105c2e6d5b49ff53c5e SHA-256: 86708a6fb6daa44255af957c8a04f3444f383b06c028a03364f8bcbe045bcd8d
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, 'https://resalured.ru/strik?utm_term=pathfinder+player+character+pawn+collection+%2528p2%2529', is likely part of this scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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.
  • 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://resalured.ru/strik?utm_term=pathfinder+player+character+pawn+collection+%2528p2%2529 PDF link annotation
    • https://vijibasotaxeja.weebly.com/uploads/1/3/5/9/135990507/kimopetogud-kimevumakisula.pdfIn PDF document text
    • https://zajoralesame.weebly.com/uploads/1/3/0/9/130969459/nanabokitulamalur.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/LjdtjdM/nike_lunar_racer_for_sale.pdfIn PDF document text
    • https://fefajuvojamunuj.weebly.com/uploads/1/3/4/7/134750085/588373e7.pdfIn PDF document text
    • http://lemixop.iblogger.org/achievement_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiwaduna/YV0sdjh/good_knight_story_sword_of_destiny.pdfIn PDF document text
    • https://duzopotubesafes.weebly.com/uploads/1/3/4/8/134890215/36a2fe.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/f2Gghha/best_arabic_english_keyboard_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/takakakod/ihCifha/fasexusakubitogerujok.pdfIn PDF document text
    • http://vetodegaro.22web.org/communication_style_quiz_assertive_passive_aggressive.pdfIn PDF document text
    • https://zerevodajerut.weebly.com/uploads/1/3/4/5/134502997/3389047.pdfIn PDF document text
    • https://cdn.sqhk.co/megilujij/hqkhaja/primal_legends_gift_code_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_12ce860785134d8786d35a385fce2ae9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7fddae7-e1d7-42d9-b753-d062229f1b2d/13722978886.pdfIn PDF document text
    • http://fezuveguxala.epizy.com/xokufubexuxatafa.pdfIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_868093c9d51b45af8dad04c700a628b7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da44d0f-b031-4335-9137-34a75255e9a8/are_hampton_bay_ceiling_fans_good.pdfIn PDF document text
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_9773c0b004764325977d4ef1b1bd8502.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3156400-731b-4261-a7f3-56691997ade1/lg_hbs_900_bluetooth_headset_factory_reset.pdfIn PDF document text
    • http://setixebasedi.epizy.com/62217907730.pdfIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_7d46ee98691c4271be5fcdd91e2736ef.pdf?index=trueIn PDF document text
    • https://00eaa6b3-f026-4720-b00f-fafb40066352.filesusr.com/ugd/d498be_f14184aa5781403a994a8bb9e19fa752.pdf?index=trueIn PDF document text
    • http://xajetizefo.rf.gd/4091863207.pdfIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_200744cc9b5048e0a143ef18b795cb1e.pdf?index=trueIn PDF document text
    • https://5ccda086-29c7-4024-8a93-689df1f3b89c.filesusr.com/ugd/ed8107_7a8e20a077154cf2ac9e1a92e240e0e7.pdf?index=trueIn 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_off0000ee34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE34 5544 bytes
SHA-256: ffa3dc18607d9e9b6235c036770a5e08314f41eba0edbae278f0ddda918de569
font_01_sfnt_off0001013a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013A 10344 bytes
SHA-256: a42f112ceec03c833aea2d7b4b9d4f9b08e641a7ca2407e9471d9690bbf7c231

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