Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc973c26ffa3c67…

MALICIOUS

PDF

79.5 KB Created: 2021-06-29 10:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9ece96276328b0d4136f574218f1ca93 SHA-1: 9e534d15d0d97a9e8a53f5eec105870d3abd60d7 SHA-256: adc973c26ffa3c67b551b72971abb46219f23850ee215f2e86f247b280cb9295
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous heuristics point to the PDF acting as a link farm, directing users to various external URLs hosted on compromised WordPress sites and disposable domains. These links likely serve as a lure for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://garglob.ru/uplcv?utm_term=capoeira+fighter+3+download+full+version PDF link annotation
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/8tau33ek7g7glev0n189q230tv/13825010827.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/badose.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/rciskjfskq7b1njlno64l3b19g/buwopelatige.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a3dda9c8fc6---polosudivixorirojo.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b60bcba0d40---fikam.pdfIn PDF document text
    • http://apcmagon.com/userfiles/xovorukok.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/temazipenuvosumizukaf.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/38318267772.pdfIn PDF document text
    • http://zae.me/datafiles/file/30362131855.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/1676808037.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/01f18330167388cfbce7e2bf25183444/gitajupufut.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608656d46f10a---10480246270.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c28456bce---josud.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/10470394421.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/546c0f71f2d4355fc1b83e5f63967a2c/96056185865.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/40461826948.pdfIn PDF document text
    • https://monyetjoget.com/contents//files/vezopolupuvigojazobowav.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/sizovivoxo.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c038dbbf38d---74767813646.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609b52e0d62f3---zipugibewo.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/dstkpf8kspdbltu2i5hi2ld677/kazipulatuwowexokanen.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/vizuwomexedasu.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160bed9bb3b655---miluboguzedukogowojel.pdfPDF link annotation
    • http://velo.hu/UserFiles//file/33497619813.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/f93940e4b84898638f275f0d8a1ec555/kokevexaxudep.pdfIn PDF document text
    • http://irollee.com/userfiles/file/jajejeb.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_off0000d23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4E 16764 bytes
SHA-256: be6ef9587bd256342038f4d886ba930fe0839d85c06f85212cca188aef89914d
font_02_sfnt_off000115fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FD 11232 bytes
SHA-256: c4637451b2a88217ca646d7c42c00e7d3de9f20519809246bdc8f87f9fcd2e43

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