Malicious PDF — malware analysis report

Static analysis result for SHA-256 70151f41055e7674…

MALICIOUS

PDF

82.6 KB Created: 2021-06-30 02:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 524cdb7427404023f03db948b4bd5fc7 SHA-1: 8ba790a08dd2d9d981028851337add953a3da27d SHA-256: 70151f41055e7674758123225ed6685dd9d4e15b21dcf2cc63fe0f42b5d3a405
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains numerous links to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crysiq.ru/uplcv?utm_term=bronsted+lowry+acids+and+bases+worksheets+answers PDF link annotation
    • http://fandimnarodaku.cz/upload/file/89105415252.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071dbe26e1d7---nisezomeworupeborinujefu.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad657f0930---14938607648.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/13ea1687ab0968571da9558c7eb1594b/27178974639.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1606f189e30cfa---kuxijeku.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/52505649915.pdfIn PDF document text
    • http://jsdarvin.com/files/41442009056.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f828c8b34---71148991038.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/64480121443.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/f61304e5019ed07f6820f3322af5fd69/jofefowutisosajezito.pdfIn PDF document text
    • http://fittbike.hu/files/file/13104987078.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d38482d9f5---benukalomizibafek.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2b8076d9c---baxobinatakebofetab.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/91836825546.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/18272756269.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/rigejudorunajixaxo.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/nijepamasizuxejajadobas.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/d3d31b7998b77d1f19d09536f80618b3/79072802850.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/04edfedc85d130ecbd6ab6600fd0e986/xaxanifetojoxixilaxe.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/22313265356.pdfIn PDF document text
    • http://bronia.org/userfiles/file/25480894239.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/4728f2996a8bce81648791c64ea689c4/20816073955.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF77 10952 bytes
SHA-256: 6b9b6f9332c455dc77574c2a3c02e67616da8d43dda541f97c2cde3f7b976115
font_01_sfnt_off0000f8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E6 16728 bytes
SHA-256: 46d0e6ceca081cb683fe54e7b05f411f12fe942ccafeae7ba25a0f85adb19cfa
font_02_sfnt_off000124cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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