Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e1191618817294…

MALICIOUS

PDF

69.3 KB Created: 2021-09-16 19:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d1ace6d6d9b7a7e54ae7d7227191c4a0 SHA-1: 295fefac6633fdb10a1950c1145498b31711ee4e SHA-256: 56e1191618817294f1a3b1493bb9eb26d5c74a6f63d1d3248a2514ffe66b6ab5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'utm_term' parameter in one URL indicates a phishing or scam attempt to track user engagement with deceptive download lures. ClamAV and ML classifiers strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://medvor.ru/uplcv?utm_term=download+iso+crash+bandicoot+ps1 PDF link annotation
    • https://www.bussmann-tiefbau.de/ckfinder/userfiles/files/dadekuliginamukifal.pdfIn PDF document text
    • http://domosplast.hu/files/file/97744616744.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/b2dcc66ab8bf065e25c77c0e7dbcd678/55543542281.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/gukulus.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/najikekabajiraj.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/ramizajebexa.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16132f81ac3291---nidulimebo.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/ef18480630bf73855d988898136c3af0/nusaxeraredubutuber.pdfIn PDF document text
    • https://panoramamall.bg/ckeditor/ckfinder/userfiles/files/46049789937.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/29561355794.pdfIn PDF document text
    • http://nenorm.com/files/files/gekabop.pdfIn PDF document text
    • http://hoaphathotel.com/luutru/files/xisajuzilinikuwofer.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/zapokidobejudolusobe.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/wuginudijegeri.pdfIn PDF document text
    • http://mc-opony.pl/files/file/budifasemorizemo.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/89238436889.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/bonobariretiwe.pdfIn PDF document text
    • http://maychebiengoduykhuong.com/media/ftp/file/dojifasa.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/masegazogabujebisetufoded.pdfIn PDF document text
    • https://rajakedua.com/contents/files/wulidukifam.pdfIn PDF document text
    • https://manhremhoangvan.vn/wp-content/uploads/files/nalotokumule.pdfIn PDF document text
    • http://starfishdowney.com/uploads/files/fuvobazel.pdfIn PDF document text
    • http://chayka-svg.ru/files/merixelelubugi.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_off0000afa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFA8 10760 bytes
SHA-256: d975694be02340a6c83e7d057234b3581b1a2f7f64a49205c230e75dbea1ef7a
font_01_sfnt_off0000c832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC832 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE044 15400 bytes
SHA-256: 3fce27a27bcf39a58756e975b4b14dc5d0ae728544e6711143ef8a58ce6efaa1