Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c679b1ad7bf50f…

MALICIOUS

PDF

90.4 KB Created: 2021-02-16 00:41:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 00b4d2d2ca15441bce7b9551c756f93c SHA-1: 933476deb5e08e67cd34680f258891834efb0f49 SHA-256: 92c679b1ad7bf50fb3cc9126e56fcea06227ce5deab0b881312e9e35d3fb2739
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The presence of a "Fake invoice / payment lure" heuristic, combined with numerous external links, suggests a phishing or malware distribution attempt. The primary malicious URL identified is https://seumenha.ru/wix?keyword=audit+number+on+texas+drivers+license+under+21, which is likely used to redirect the user to a malicious site or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://seumenha.ru/wix?keyword=audit+number+on+texas+drivers+license+under+21 PDF link annotation
    • http://gayerkan.com/2909099765049exw.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/ShbiF1N/nesoroviwo.pdfIn PDF document text
    • https://cdn.sqhk.co/rubekafux/jhagLce/famamatakomet.pdfIn PDF document text
    • http://hangzhoumetal.ru/disbelief_papyrus_fightabtd0.pdfIn PDF document text
    • https://faripolugariwel.weebly.com/uploads/1/3/1/4/131453512/ziwenanagumilepi.pdfIn PDF document text
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/bowepigiwixo.pdfIn PDF document text
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/8718328.pdfIn PDF document text
    • http://autocredit.moscow/wogapivavovatasokomivey7.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/vgfidhc/minecraft_guide_exploration.pdfIn PDF document text
    • http://wifefavowe.iblogger.org/96692352349.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/desuzetufagefatumuf.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/jyrlojI/qatar_stars_league_table_2019.pdfIn PDF document text
    • http://roman-holidays.shop/muzapogevojagawospyka9.pdfIn PDF document text
    • https://cdn.sqhk.co/rivitovolu/Gkheidh/3546332977.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/10106793216.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/ignou_assignment_cover_page_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/como_buscar_un_iphone_desde_android.pdfIn PDF document text
    • http://weverikovufom.rf.gd/bts_members_pics.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/xavabifedibudivem.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/mixufipomubemax.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_off00012456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12456 5528 bytes
SHA-256: 4c7de5cc16a0a8e68287d42ba42a3d40b4b97662ef1b0854d06c3fe888ff3fa9
font_01_sfnt_off00013712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13712 10796 bytes
SHA-256: 613a7eaa59e18f3f7a4367f7b5d9bf0e1e27d585f5de1b6018c30e292e041898

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