Malicious PDF — malware analysis report

Static analysis result for SHA-256 77479bc1a34188da…

MALICIOUS

PDF

90.3 KB Created: 2021-06-27 21:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6dff42261e7979382a506841c2701665 SHA-1: f1170e3c407c183730709dd45d2941375e7aed6d SHA-256: 77479bc1a34188da857ddb9017dbae93d26a49669d23603cfbd3d1044373ddfa
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to potentially compromised WordPress upload storage and other disposable hosting sites. The primary purpose appears to be directing users to malicious content or further stages of an attack through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fd5d68a3a---86741328718.pdf In PDF document text
    • https://vasantviharproperties.com/userfiles/file/4722088013.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094018736f72---bubuxo.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210624_121F132DF3032099.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c08e06d07---sekepilewopiko.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/suligojezexoz.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/47036056067.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ada9945829---67934077592.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/37545983647.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/310512386674.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/bb4dc9cc8b455bbcbd132f3b2a7a91fc/mizoxenosozasozabexu.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f74d09285e---77871232810.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/5372262065.pdfIn PDF document text
    • http://velo.hu/UserFiles//file/dukolataga.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c74cf79ff8a---15041698628.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d0d50262f---pagoxukefotigojerawa.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/2eed0b99f32cbc9a9809825acac857a1/ditodami.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/bepufabogo.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/dab96ad632d4c7fad1b694ff205470f5/tezuvadeb.pdfIn PDF document text
    • http://www.bash.cl/media/file/basaxumuj.pdfIn PDF document text
    • http://df-foundry.net/d/files/koparibejumaduzularugifu.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/zunewaxexoxuxizelor.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d5efc52a0---56410074683.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/javusunirevevumaludap.pdfIn PDF document text
    • http://hkalc.com/userfiles/wilamejuz.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/91239676090.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4dd173b72a---38965943993.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210619220819_ggyoaa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=best+waterfall+hikes+in+southern+californiaPDF 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_off0000ffce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCE 10764 bytes
SHA-256: 9bc4958ee900266ec705ed4a0fda9303d62a871c57f7d6feb6401cc9ebd46e32
font_01_sfnt_off0001189b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189B 16388 bytes
SHA-256: d059580af001fa010c2d6be1a7cb8876f60f303eceb5d946050d7d530efc7251
font_02_sfnt_off00014341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14341 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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