Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2f3dafa43530de…

MALICIOUS

PDF

81.5 KB Created: 2021-09-07 20:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 901208b2a9fde59bb076f4aad802b79a SHA-1: 455a448006831d1295557d495c1602b97196c02f SHA-256: 0a2f3dafa43530de65522b625e5ff924c28037df379d202ad42038cc92db84eb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell 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 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document instructs users to copy and paste content into a command-line context, a common technique for executing malicious code. Numerous URLs are present, many pointing to compromised WordPress sites, likely serving as download locations for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://crewmak.ru/uplcv?utm_term=autocad+2008+3d+modeling+tutorial+pdf+download PDF link annotation
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16089b69a3d0a3---tevarubibujepitisofewot.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/63804429606.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-7/20210907175937342919.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090ca52b6400---vojobudimugidururupuzi.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/62446842854.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/83216477048.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/cfa75a6ffeddc3a600201cc67d3789b7/76560330906.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/11658111233.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/fanix.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/44328436954.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/senekowudutoxeb.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/2dd54c27b63629ce9eecc0cb4d1e2491/dagegiwidapewixamev.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/f20a80023ffebdaa41d21e7c19acaf25/50498307491.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021070519370234.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16115d8d270f92---38854422638.pdfIn PDF document text
    • https://flyingfish-stay.com/userfiles/file/85928611299.pdfIn PDF document text
    • http://saydersan.com/firma/files/20230585910.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609c392797aaf---91157238287.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/16203237215.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/saneneviganewanu.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/88944661151.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbda80e9ae---86404662626.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/10688909412.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-5-19/20210519210317451030.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/kivuxoloforebavog.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E9 11584 bytes
SHA-256: 3003c9c64a9993e612db018ec1c64b60488c948d7f701c5ddc10339af0cb833b
font_01_sfnt_off0000f55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6E 16560 bytes
SHA-256: 14ac3dd4a333b163cf26d6572d36bb98ce60cfa486efc77d0a516cf224349fd4

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