Malicious PDF — malware analysis report

Static analysis result for SHA-256 affa902ce2a25600…

MALICIOUS

PDF

74.4 KB Created: 2021-06-29 22:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: fe5d5a106df8bfae47380d22261765c5 SHA-1: 4619a410a9173687fa8e444f78a1f0f7d5c9ad4e SHA-256: affa902ce2a256007e997bdb1cbac2efa6827d5943afa2d1f793af565d6df330
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links are consistent with a spearphishing attachment used to deliver secondary payloads or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://garglob.ru/uplcv?utm_term=which+has+the+highest+density+solid+liquid+or+gas PDF link annotation
    • http://meandnetworking.com/ckfinder/userfiles/files/90780476151.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/fosofixikobud.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/1f2a7ae6088d3b9cc613c43191829bd5/tutamumarafoxorupuma.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2bd83d488f---24401807847.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160755ae53d44a---3487118235.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078554be729b---bobesitiragulo.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/fobuboviked.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/69533268230.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160732ab6d1796---tikej.pdfIn PDF document text
    • http://fittbikese.hu/files/file/74332707720.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/jadaku.pdfIn PDF document text
    • http://greenhousehotel.vn/uploads/image/files/20779677970.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/96075782398.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/ia1f2l2a0huge9k5q5q39794bl/lametaves.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/76005f20f4e36c6cd9e41f4efc5b2fab/diwexikam.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/roxizusidixanuguzenurezu.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/gapafurizilebijabokobaku.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/90651460413.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf82b04eab6---gibudiwapalevanavineroma.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/lalijulimanano.pdfIn PDF document text
    • http://shopcloud.cloud//ckfinder/userfiles/files/78490647589.pdfIn PDF document text
    • 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_off0000c23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC23E 11000 bytes
SHA-256: 993037de88a0603effc7bd6ff18477c6faa569e2e8cef3a41c254dd37de0bba2
font_01_sfnt_off0000db4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF361 15920 bytes
SHA-256: 835fe4922735dba4f323e187cfe2dfead560ec7797f2c8596dbb6874e21a6614

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