Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f5ea74e1f40d8ff…

MALICIOUS

PDF

87.4 KB Created: 2021-07-01 15:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 482a30c923acbfe0cc4f2d9d8b3d4d65 SHA-1: edc44f79618c330182e2460550700cf477e30929 SHA-256: 3f5ea74e1f40d8ff634fbc78102977cc7d81bc1f45d195582b1ceb3bd86fc98d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to numerous external URLs, several of which are hosted on compromised WordPress sites. The presence of these links suggests an attempt to lure users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://trendymamy.pl/userfiles/file/45124528025.pdf In PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbe6e20014---81462380675.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772765138a4---59332037965.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/57408481684.pdfIn PDF document text
    • http://sport-way.ru/img/file/xesijobebugotexelur.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/budikodorat.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607727c2d15d2---37348603501.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160980e5f348c3---buvapepavurijozowu.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/ratozuvolewononewikufa.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/c569u078757qg0mfoc0f1onl76/53395737390.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/damufobe.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/aa1250765b6fdfd7932ac7eb019078b9/31994916277.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0c14db5907458cd571412724ae18309e/nikepititajipore.pdfIn PDF document text
    • https://soechi.id/userfiles/file/74593929073.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/muwisejimexedel.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/6574a1aeb8e2220d2c277e86b0f15f11/97305834130.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/42174643336.pdfIn PDF document text
    • http://firegallery.ru/img/upload/naguzasejawelitanileja.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/48603215625.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6917cb2dd3---95769485304.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/35625dab24f0e6900e3af202a0a9f751/84809323959.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/81bf96e20d7f7f270fa12dacf29292a2/bozazo.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/9t1b2o75rq3q3efjdnl2i5m1he/86618892119.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/fujoludujadepiliwoguni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=different+shades+of+green+eye+colorPDF 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_off0000f36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36A 10872 bytes
SHA-256: fb8cf9b5dfa227dae64928b765fba5d4bb417492c2310319069269260b53420c
font_01_sfnt_off00010c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C49 16752 bytes
SHA-256: b505a022d7abea67477b7b4d9baab49dff748b57f68e0330dd387eaf5a891859
font_02_sfnt_off000137fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1