Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb696171f4c2809…

MALICIOUS

PDF

88.7 KB Created: 2021-09-19 07:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bca22a855206c7fe8ec51306cbd46cb8 SHA-1: 248148563be33fcd7803084c30f99d88102e4de8 SHA-256: 0fb696171f4c280997a6ebbb43d1a9563f1e01c8fb086c66154354cd272a0b41
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to a compromised WordPress site. Heuristics indicate this is a link farm, likely designed to redirect users to malicious or phishing content. ClamAV detection and ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16130f58cc6b7c---xirubedejipigibi.pdf In PDF document text
    • https://xulynuocphangiathinh.vn/images/pic/file/85104691588.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/difebiragobeb.pdfIn PDF document text
    • http://tradotel-riviera.com/file/daxevodidovivo.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0ede386a0---31873023255.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/17955649815.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/pukidagunonazix.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/70994400893.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd30aa78bf---rekawenepuxorumipuzif.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161432f351076b---87616093328.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/dap46og11pqgn01rbgt1hfg4j4/watezipeki.pdfIn PDF document text
    • https://hotelite.in/userfiles/file/32230613888.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/161338dae1675d---4995949975.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/d8d4bd26f1a75da2938b24fdead2cdf6/xitibemawozezamoz.pdfIn PDF document text
    • http://gyn-ordi.at/myPix/file/9398632718.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/gimavavepafoteluj.pdfIn PDF document text
    • http://djapm.com/userfiles/file/66530052632.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/zasedemezisakomij.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/8714586244.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/nesoduze.pdfIn PDF document text
    • https://superlitefan.com/uploads/files/jifopoxaraj.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35321272596.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/89168336290.pdfIn PDF document text
    • http://smm-mm.com/uploads/news_file/xamanatenedazepo.pdfIn PDF document text
    • http://hzqljsj.com/images/upload/File/23954135911.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16143361e9271b---vunikitisofukeki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=el+coran+pdfPDF link annotation
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/ximugedenubesafokawafe.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_off0000f1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 20744 bytes
SHA-256: 8978504825ea73b5716c0d617941673c535a70248ba1cf52160a8ae99f4ff751
font_01_sfnt_off0001253f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D56 10108 bytes
SHA-256: 92d3bc016c5c5c9beed954a305d8b68c4d7fe3b19830cd5b64bd969cede86a81