Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00672f6a28b7bba…

MALICIOUS

PDF

99.5 KB Created: 2021-07-29 09:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: fcd313b3a14befee0e4f7884c697c124 SHA-1: e2c4ecdc457f1f25acfe87469df7ecb32a0b4ec1 SHA-256: a00672f6a28b7bbac40b48d24c2986dcc4e4a178472ad64aaa60b74ce415fd7e
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, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to further malicious content or exploits, indicating a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5327a9d0d---letexanovuzefimuzukusexe.pdf In PDF document text
    • http://boek.se/bilder_umeny/File/3884977580.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a94259be639---97969460935.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/bdb8caf0d0fedf5374e7836b6133e18f/wekupawotokebopapoj.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/gubufosopesagorogutawov.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/vomurizegavatexojezukakop.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/86d901740b88730f9cb8f11cd978c71f/17981785515.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210531134548_pft8ij.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4c4f76c75---767161478.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/50043623242.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5fc15baf3---10044052578.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/5c0c19ab24f3a2f4257082b331e97623/37886728571.pdfIn PDF document text
    • https://nwdglobal.com/ckfinder/userfiles/files/nonoranoda.pdfIn PDF document text
    • http://spoilersmensgolfclub.com/clients/865201/File/81979500567.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/jirebudebujifi.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdccabac79---40095692152.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c66065a118---dokuwiviwavupefife.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/47302113597.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-6-29/20210629100202580042.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/62695486017.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606d46e224747---29931724550.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/2462744128.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/f7oarck6dbr5v7dr0igiu7c5km/15291916610.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+remove+graco+pack+n+play+bassinet+coverPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/1f67a5e58e44b47954f81efa4839231a/73645411991.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_off00011fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAB 17912 bytes
SHA-256: 1b88b5be799f239f8f763ec7c080d1ccea1dae0089050a53256ec628e3ba0ed2
font_01_sfnt_off00014e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16682 11204 bytes
SHA-256: ab521d3106ba969a1011811ab552149fca985d02e82f6494a78d2d5b3bdfbbfa