Malicious PDF — malware analysis report

Static analysis result for SHA-256 7864f9f1f9cd9eb5…

MALICIOUS

PDF

83.7 KB Created: 2021-06-30 10:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: bdc4a166ca8fbb25c80d5b2b9dab89f3 SHA-1: cf674af3c337a8754fc5637ea69d2cc0052078d3 SHA-256: 7864f9f1f9cd9eb5ca023029b1754fd877bf86871615c69eca25dc8b8732c1bd
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or downloads. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/28866d6eaa4fbab780fbc090a80fd48d/1142343657.pdf In PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/ece1578298a759b5448b7f36c736662f/68846391390.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/8f6c07ab8ea206dd3841f34582b06a64/bamalekiwuwojobewimanabi.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/vejofemururaxuponugux.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/b99jp4drg90cena7inqm2mogl4/gelibesefotawonozaji.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608674a0add9d---losoge.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/dd00deb97117b9ed3badc74c945f6975/fedapinigubogujekejarovut.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/nenugujonekusosi.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ab09bc7b1---9454235048.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608022947ba62---wowapevozifime.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/a97ae2521ee80e1849cb52bb468c839c/61459434575.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/0974452551d14243e73541df19b012fb/23240050713.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160ba459735015---84473928117.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/0a1ee42c286f27cd42017637bd5e7d78/kixaresaguwefalezewavo.pdfIn PDF document text
    • https://hsse.cl/files/68345653159.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704d5e4edbb---mimizakokemofogajile.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/momirafulovukenog.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/69214932131.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609fad96201c0---sowuvipasabefazaj.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8a3d69b8f---72423475666.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/63f076ed24444ed273471cc44f84de1c/noviwubudujinitoxox.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b80cbe6a34d---54904081140.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af8979b59a---30464950551.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/c9ab90fe6fbba0760ecd20db14ae1905/79152722403.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1611c7453---tawesetusibomezokoditoz.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b897105059---64474780273.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=ibis+paint+free+playPDF 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_off0000e505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE505 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 10436 bytes
SHA-256: 4299fc343e77ff2984f18ed32d8c0e557e8f2e421fe37370f265c9f6d611825c
font_02_sfnt_off000114b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B9 16700 bytes
SHA-256: e954d44c83a8681f4034a8ba15a73fecc4e777a03548a305e78f54cf96399b3e

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