Malicious PDF — malware analysis report

Static analysis result for SHA-256 134f7296348900be…

MALICIOUS

PDF

82.6 KB Created: 2021-09-07 16:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3c176ff3a9e73bf5cbd64519d73acf05 SHA-1: dd26fb6ad6e2d735aa6c3b217c1dcb6a79d02af8 SHA-256: 134f7296348900be3ea37d7366649da5b9bcf8c7238357d24f64b0ab68abda33
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution scheme. The presence of a raw IP address in one of the URIs further indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://razaviota.ir/basefile/razaviotair/files/wumetasonob.pdf In PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/1vv2mmbr5q2jo7bk7jlasgo63f/zediwareb.pdfIn PDF document text
    • https://kingdom.vn/userfiles/file/zegalepiwexonowusitofo.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/bojubegiwumojizidov.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/66039436135.pdfIn PDF document text
    • https://soechi.net/userfiles/file/26247597084.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab02fb140e---sexowopiwesida.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/7c2b4ba4742d42e43bbb27354e798eca/380824674.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/ccbcdc1d307e9414595f009f21f22c5e/65677287447.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5889a8984---badawabij.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/be0e698403cb23baec794ccf493da4e0/worisegodo.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160774851a5def---92090549690.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/pifovuwitirimar.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865d98b45e9---borelizote.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/ridaposo.pdfIn PDF document text
    • https://www.domosystem.gr/ckfinder/userfiles/files/83951915217.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/37455727093.pdfIn PDF document text
    • https://cebubigsellers.com/userfiles/file/refawikajakuvefufoj.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/favopobaba.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/88898469513.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071796a173ab---purebo.pdfIn PDF document text
    • http://ovstav.cz/app/webroot/files/files/46503793357.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/j9qlb2o2kv1bj68j8s781rseca/rodobimebilof.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/98069170951.pdfPDF link annotation
    • https://propactionvehiclesuk.tv/userfiles/files/zakadupelokedidekawubuke.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/okcec89tt3bo30634vtn3r3eep/rirerexopumel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=il+penseroso+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C0 18504 bytes
SHA-256: 60b6120761b73b724c82d3d9a318b36b422b0adca2aa71a142044e5e87469c3e
font_02_sfnt_off0001267d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267D 10092 bytes
SHA-256: 219616e1edfdc207bd4ee352a8a914581e8797a91d4c7bb6ad2337bb6bf66bad