Malicious PDF — malware analysis report

Static analysis result for SHA-256 907dc602e320cf60…

MALICIOUS

PDF

90.7 KB Created: 2021-07-17 16:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f0f0b83b4a89222a2d1bba9745f36744 SHA-1: 96044c456a167d209ed6561302cf0a517a3da085 SHA-256: 907dc602e320cf6029895a78a627a90aa86a5bfb71a168dbfa5b20113552b462
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ifa-astrologie.de/userfiles/file/16382183719.pdf In PDF document text
    • http://jonmechina.com/ckupload/files/31900344799.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a32ebf060b2---5547655606.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/n1k7psmb67vc580i6tm1l9pr34/sofelibugadedegufori.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/0bf1fef579244a245ab8ddc8a26252b0/77908905050.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b71ae99e38f---75046414598.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160783b7791a3a---13733974186.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/dalobupajuxirerilonu.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/24426325928.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/opemlvgqrcaqhi5m7lk86ie82b/18577494443.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98a5447dcf---52283915446.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/72275963273.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/fodaro.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/23721007885.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/55978052337.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/15949016874.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/9ce7be6f68953ea1fd43ed308d0d0135/50565247145.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef1327927f---kerokenukijorupafi.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607899224c22d---renetukezedatu.pdfIn PDF document text
    • http://vlajamo.cz/images/file/dawumajuruxefapoxifuwek.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/torenubigudubotapege.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/sigivutulusanuwos.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/47js37jooars7vkbkis4498d4v/jureme.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/1b452539883afff9913281549d25abce/93202908770.pdfIn PDF document text
    • https://makanbanyak.net/contents//files/86276173957.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/7864a139e708145ca19f78b4b88952b5/jivesifutitot.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074db4bcebb4---kufuzi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=skyrim+console+command+leather+strips+idPDF 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_off0000fbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB7 17632 bytes
SHA-256: 3619a91deac8b9448bcc73c837dc0c921024bae1d1f325579e4ce10df929f0d6
font_01_sfnt_off00012998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12998 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141AF 11060 bytes
SHA-256: e073e116d89f4d1c8e31395fb8cecb2199d5c98325812eb563ecc56671bd6ebf