Malicious PDF — malware analysis report

Static analysis result for SHA-256 494ac798f0f7d3ce…

MALICIOUS

PDF

81.6 KB Created: 2021-09-12 13:34:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 6f94653b803e1449108d77ccb6388418 SHA-1: 5f855da8f841431aae3dd2bbd97ea9e991b3d17b SHA-256: 494ac798f0f7d3ce71f0decc1e42e2fe6bc7307d3648e4db6e6b14bece099929
164 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to various PDF files hosted on potentially compromised CMS upload storage and disposable hosting. The presence of a 'download button' lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://playindiano1.in/ckfinder/userfiles/files/22600423372.pdf In PDF document text
    • http://qqwandai.com/uploadfile/file/ninavimopazogenam.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/samanabofepedisobevo.pdfIn PDF document text
    • http://csc0731.com/userfiles/file/20210910070353_c2iy2g.pdfIn PDF document text
    • http://itemclinicchina.com/ckupload/files/3653972509.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/27089472814.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/pomifezereduletokajiban.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/83453566733.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/mexebibibanetedobosuzefa.pdfIn PDF document text
    • https://miraclechuppahs.com/userfiles/file/40122218852.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/popofa.pdfIn PDF document text
    • http://geomanteia.com/userfiles/files/13922321958.pdfIn PDF document text
    • https://tepihtrava.rs/files/69949298617.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/nodubi.pdfIn PDF document text
    • http://sirinthepgroup.com/userfiles/file/sanew.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/82hqan3df25guqrd8psl303cc6/dakiwipefiximedefasiwo.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/sajagojegitumixogokutu.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161361d6b1a6ca---85599841755.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/41687504814.pdfIn PDF document text
    • https://ddtoyz.com/ckfinder/userfiles/files/sefebitaxebuwi.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/begijenikovazoref.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021911637416002.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/seduwusisulagojasekovaja.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161332c76a1856---pebanodapigerawiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=the+power+of+now+ebook+downloadPDF 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_off0000dc7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48D 17332 bytes
SHA-256: 3894bf7bf75fb18d9eddd6e965d7c9871a1e70bed947977618428d6855e0d33f
font_02_sfnt_off00012100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12100 10520 bytes
SHA-256: bc67603c714f7ec795e99a1a863ec291e77e53fc7924ae0f2af970127cf7afec

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