Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0cbff636ed0884f…

MALICIOUS

PDF

85.2 KB Created: 2021-07-23 19:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 17b1d1ac206f5741ec4363a9f69f96f5 SHA-1: 192dcaec24d24bf5e80d44ddfc5597654214f359 SHA-256: f0cbff636ed0884ff0dfe1d8f2e9bf26de800db083c8905faa9135b137c7c9b7
156 Risk Score

Malware Insights

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

The PDF document contains a link farm directing users to multiple websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/0d4no277fvr7gmccke3sg0b4g7/93881228292.pdf In PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3809ceb21---492905751.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/moxunegogazilafutefuriw.pdfIn PDF document text
    • http://flyingcarpetclementines.com/userfiles/files/96981106414.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/69778190963.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ellcu2aq05l35birsfpbhtfhmo/21911315551.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/pamufojadufakanazuduna.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a38e738dbc4---buxejitulubiziduna.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc2c34fa45---31940871262.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/8611125461.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf643a51d5b---mufowixoselivifex.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/d566ff8574300bcc007e0af77fb522c9/3682202086.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-10/20210610130140113097.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/5963800331.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/fdc842e6cd1b649a7f2fb9bbf3669e6d/46080289477.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/68297036928.pdfIn PDF document text
    • http://yuhongzg.com/d/files/wodiwilokiwopumemizetetu.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7cf5518b3---44676489979.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/dekufesibabotegogasunixub.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b32bb6609---80402056862.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/3dtf3u9dng9fdtegfmjcv3m6kr/badapetovewitujagi.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/31917083533.pdfIn PDF document text
    • https://melz-feu.ru/upload/zizekebitelatatejep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=laberintos+para+imprimir+7+a%C3%B1osPDF 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_off0000e7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BB 10720 bytes
SHA-256: 7486bf883ed3ade9073165bc29f21d9bcfaef8ea7f76cc8b70c2812b23a35e73
font_01_sfnt_off0000ffe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE8 17704 bytes
SHA-256: 1b4742048cdcd825fc0dbeda1548c5eac6f83a7249c87a8f875a0bd45906758c
font_02_sfnt_off00012cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1