Malicious PDF — malware analysis report

Static analysis result for SHA-256 847be085bc642f6f…

MALICIOUS

PDF

104.0 KB Created: 2021-07-16 10:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d9d19f33c4556687a84c07b0298d70fd SHA-1: 6d8db0021f1d2c3c10bb0770fb3f9e994ac2946c SHA-256: 847be085bc642f6fc6bea01f560e0e91b7843c3e4e4434c313b79444bf76535e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of multiple compromised CMS upload links further supports this. No scripts were extracted, but the overall structure points to a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9847

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://laborke.ru/uplcv?utm_term=meaning+of+overbooking PDF link annotation
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/mogubonid.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607427bb90acf---derugivisulakubujixes.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/kidasalalebagujumijigujup.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/o79gdgi3fqat243knsnpoveuin/8494393116.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/6t1g4if3lsubtgmpul3vdekca1/nexofo.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/c23a3f4d28d435774716c0c1f321012e/tobinutusak.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/19ddf6309eb4648a6a22def74eb3c10a/kolotoduvukakotewegama.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/ranuw.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83be89d35c---jeromivigorunegivilenu.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/ub5h9f152icq6q6dn4gatma8c6/34560151711.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/bifedovewudosomemu.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/tatasoge.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/12770587433.pdfIn PDF document text
    • http://nuestrasenoranm.org/clients/8/88/88a18899c67a61641ca1f7d027daa919/File/5187158005.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/dkqtk6qnm3sa35p74l9355qeng/kosotigatazivaniro.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/c76961d63e579ab6a196b62f89793e0c/43011406015.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/20380443066.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee935747572---ziduvafugozuk.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/9vt4tjrlr1322cu9gn9drh5qv3/wesodu.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/2861a48d2e1c5c90c6264a32a96db829/kudorozudenitarapebu.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/vedesodaj.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00012c73.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12C73 20648 bytes
SHA-256: 9aae54cc6a238ac0908d36d7a9090d794ba62996a6dc9dbc5c29ae00b647f6b0
font_00_sfnt_off0000ef75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF75 25080 bytes
SHA-256: 44ea881a309b0291e9dfd540e3e5b9437fff29464c6d18d99f5b2692a86744f9
font_02_sfnt_off000150e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150E7 10368 bytes
SHA-256: bea01de06973648b4d9aa324a56e0931802488b3d1df38da4e3927c2ca75c5a6
font_03_sfnt_off00016871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16871 4816 bytes
SHA-256: c75fc5ff3c52c0f5ccd9c7d99a4f79166f08c303e215cae14bab3a81fa27dd63
font_04_sfnt_off00017a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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