Malicious PDF — malware analysis report

Static analysis result for SHA-256 f229d6d373f6479e…

MALICIOUS

PDF

151.3 KB Created: 2021-03-17 19:35:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b595a64859afce0d3f5835731d7651c0 SHA-1: 9c8f4f40185eececf16be15b3c7cddeb60a2ba96 SHA-256: f229d6d373f6479e0384195325c0c3b15c9493c9959076d9e01032af7cd5ac86
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains references to driver downloads, and the presence of a 'password-protected archive handoff' heuristic suggests the user is intended to download an encrypted payload. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=dell+latitude+e5400+graphics+drivers+for+windows+7+64+bit PDF link annotation
    • https://cdn.sqhk.co/litonesi/4jcp8jf/tennessee_titans_game_day_tickets.pdfIn PDF document text
    • https://cdn.sqhk.co/xajimujigaju/fiaC4zd/jugisafuno.pdfIn PDF document text
    • http://flylovel.com/rurewomqnsxf.pdfIn PDF document text
    • http://erogan24.website/hp_officejet_pro_8600_scan_to_computer_softwareukpaj.pdfIn PDF document text
    • http://swiss-gear-top.xyz/8958855224053uqg.pdfIn PDF document text
    • http://samelike.site/mawowurelnt1x3.pdfIn PDF document text
    • https://cdn.sqhk.co/wovupeni/BdgdCUc/moto_g_power_specs_verizon.pdfIn PDF document text
    • http://gojewobisizoz.22web.org/bozejamorabop.pdfIn PDF document text
    • http://all-host.site/vue_js_component_template_filey8fgg.pdfIn PDF document text
    • http://harkateine.fun/nikon_d500_reviewsyv6xf.pdfIn PDF document text
    • http://ipoteka.net/35529531495h3yrw.pdfIn PDF document text
    • http://summ-green.fun/fepeburilesoludixerepivupcw1n.pdfIn PDF document text
    • https://cdn.sqhk.co/furabafezuse/kliaVKa/1_clue_words_and_syllables_level_6.pdfIn PDF document text
    • http://notozil.iblogger.org/jesolubevanut.pdfIn PDF document text
    • http://gikubozudunol.iblogger.org/qasidah_imam_busiri.pdfIn PDF document text
    • http://wopazav.22web.org/morixufojonoxapomiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://147762ec-90f0-4523-8579-43cb3cd17c82.filesusr.com/ugd/6c48b9_c26e24a294a646598130c44d8f62d60c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc06b95c-d7f9-4b30-a381-8981287600a0/zipakaravogogegud.pdfIn PDF document text
    • http://torusopaxoneku.rf.gd/55123218924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3e248d5-1836-4c5f-8357-3940887e6e4d/seth_godin_blog.pdfIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_ac7e035fde84427f8f12bcf6152cc257.pdf?index=trueIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_5d0fa2780ecd46d49a9c8a226bfcaac5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5cf39e8-9ae5-44dd-b700-a0641fb5358d/30242706757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe6dbbef-5762-44bd-a6b8-e15026953b68/81617956094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c71d145-670f-4bf8-9468-59d211fd8ea3/canon_mp250_ink_change.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_off0002111f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2111F 6296 bytes
SHA-256: 9007ad2147361f614b96833169886f703b1208190d08ec557535c1c284589368
font_01_sfnt_off000226ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x226AD 12092 bytes
SHA-256: 8a3c222b7895306d55bacaa1fb5c825b3969f918747b67c14be7cdfbe120a7cf

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