Malicious PDF — malware analysis report

Static analysis result for SHA-256 2810f8785800fe12…

MALICIOUS

PDF

94.8 KB Created: 2021-06-29 16:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 64c1c4a8fdda81409088961afe3b66f9 SHA-1: cec034472decb38c2386d736702a4f548483075a SHA-256: 2810f8785800fe126ee3a7dbbccd4ec6079d6d2154f48b909a7adc684e880ecc
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Multiple heuristics point to the PDF containing a link farm, with several URLs hosted on compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics suggest the PDF is intended to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://obasekiestates.com/UserFiles/file/57914685947.pdf In PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/oivcp96keb807aepbnechmulg0/33127245292.pdfIn PDF document text
    • http://camera68gialai.com/uplaod/quangtri/files/rivomofogawuzalekogopetil.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/jedabogagip.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/1597ee77587605e5b2eda3cfcbe46b73/mumoxidu.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/puwasakidetubosesok.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5b17ae1547---65136728686.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609dca0a0fa51---82160372662.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/54484639371.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdeefe397d---72074101889.pdfIn PDF document text
    • https://luminex.pl/upload/file/71464914008.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/a6kf7i65di66a59rf40f9o1930/75486577562.pdfIn PDF document text
    • https://koffiewarenhuis.nl/app/webroot/files/userfiles/files/73079366127.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e79cdf924---losejuzikori.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089a398c22b8---wagomobazave.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/97733127051.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/bowokelolakinibi.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085fed111576---31983413808.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210608_052658.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/7197315303.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7af447facf---93746618923.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/0cc7cd779b9c8b63325e658ca6c50c9f/movikodo.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/10a484d7afb4d656e7e26d01cf789e20/gikatuv.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/d2bb0b4bee2f709afbe18b6fdd91c82a/69750585839.pdfIn PDF document text
    • http://nakatka.com/files/file/85623481824.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b49486cb11d---favosimokajomegawexu.pdfPDF link annotation
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c807bebe24---gimaroref.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=witches+of+belvoirPDF 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_off00011046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11046 17564 bytes
SHA-256: 810dc34f27873d7278fa0a03c38f4a6953a75e0a647734a704ae6e5a10a86fab
font_01_sfnt_off00013e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001568d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1568D 10364 bytes
SHA-256: 68883edd0586cd15eadc8056f3156bdf9cc82b4fded054838d3946a7eb0c7303

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