Malicious PDF — malware analysis report

Static analysis result for SHA-256 171f04bee364eec0…

MALICIOUS

PDF

76.6 KB Created: 2021-07-21 03:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 3a5a960cc335b3fd7670fa439c8ea6e8 SHA-1: ab3caaef7bc0ee32ee425dc4f11ad56dc13fefaf SHA-256: 171f04bee364eec03aa1ee9c9aee814191513fb8a83106b6611885847e9ca6b1
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to numerous external URLs, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://meruzhankhachatryan.com/app/webroot/files/file/83249275603.pdf In PDF document text
    • http://a-swiss.com/upload/userfiles/file/93061854227.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098703871242---20632417794.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/33189317891.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/56875098041.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/21936066918.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/zinomuwuxu.pdfIn PDF document text
    • http://ubest.ru/images/file/lesapa.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/zagopigebilib.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/58857598916.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/2e7c839bd28393cd8db7b6cfa534524b/30291079035.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/mva1b8ljfvhsdiko3otqp4p65b/devita.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c12ef2a477d---zigilikov.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/43111765529.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/2742d1d9a049ddb6f957e5cb507a87ec/40179547355.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/qv0t6upqhml5kakmoeld36m1mi/modozun.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082661ccaf56---fezizevotopavegutujamowuv.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a695231bd---46479786948.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/73199535470.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/zejugagovesefujifotuwiwut.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c1014e838---jalamowobuba.pdfIn PDF document text
    • http://didocrosby.com/imagenes/file/sumat.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607eecb4a163a---lamezijotenurewiriden.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/ginubuwumurofalabotewo.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/losilejofenuni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=comparison+theorems+in+riemannian+geometryPDF 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_off0000c69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC69C 10800 bytes
SHA-256: 094575a073382624c8ebf32219724ef6f3e407b0d56522fcefd677ec8af4b040
font_01_sfnt_off0000df57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF769 17344 bytes
SHA-256: dea8cf5b7b151224ef62032ac12a6d6fc1c2afa21ed4342660540aef6208e127