Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab47c769eb25c87…

MALICIOUS

PDF

93.3 KB Created: 2021-06-29 09:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 7de74dd089dbaaa7d20c08b5af83790f SHA-1: a4c15260b6e643e87130959cb79231d789a9f561 SHA-256: 2ab47c769eb25c8794499e10024e8204fe48882d42bdfa18c67127c1c45167e1
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The 'Clipboard command execution lure' heuristic indicates the document likely instructs the user to copy and paste commands into a shell, a common technique for executing downloaded payloads. The numerous embedded URLs, many pointing to compromised CMS upload directories, suggest a distribution network for secondary stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 http://alfavit.tv/userfiles/file/jabositukubutupomifukepo.pdf In PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/rutukudakaginadep.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/jivifakib.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606db932879e1---nezawebadutofom.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/p692kk7q5meij5a6o0saqr62i4/28608838538.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b59f2a8bd3---33823165025.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/lufuxujewalobemegatoso.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/42065543142.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc3d7e2fae---purezasaduna.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/3a44d777adc09b59baad33c42875147a/lajibukelinanisig.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c968d71da3b---xazobidusufixuzuzatan.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749fdc1c1b8---11192415519.pdfIn PDF document text
    • http://sakem.org/userfiles/files/66168188936.pdfIn PDF document text
    • http://dlt-nkp.com/fileupload//file/78076361496.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/tqcnlfmiok9t5p56lago2lbhj7/gitadonex.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/8423721203.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607e222e02719---18571126282.pdfIn PDF document text
    • https://stopserv.ru/files/file/turiw.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16075b909ae044---7452669025.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160ab672643a61---25039570806.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/f4ikbmmus0c9qho5igh73sl53t/xuvowodavibufujodojifuzu.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d4219bdfca0---tosuxebotisakena.pdfIn PDF document text
    • https://kochitaxirental.com/ckfinder/userfiles/files/30177363964.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=convert+excel+to+pdf+high+qualityPDF link annotation
    • 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_off00010626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10626 18352 bytes
SHA-256: df84e98544b85b55bc13bfe1749f523112a7a4d7e9e2f2b465c158f83819a324
font_01_sfnt_off00013596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13596 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DAD 11292 bytes
SHA-256: 5f712f97347721809321191b3e6b5a9fe6e7e1c900d605bd5bea6410a04c458e

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