Malicious PDF — malware analysis report

Static analysis result for SHA-256 e008dc1bff706032…

MALICIOUS

PDF

83.5 KB Created: 2021-07-08 00:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 72ea0d5d2b83cfbac0997774ce48dbc3 SHA-1: 2d39fe46ae9c420ab7e7a77087e576f1f63b755c SHA-256: e008dc1bff70603220cc7c332f0e6f5a4fcbae62f2d4c6b0ed983a7c38457749
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised websites and disposable hosting domains, likely for malware distribution or phishing. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest an attempt to exploit search engine optimization or user trust by hosting links on seemingly legitimate but compromised or disposable infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://allytemp.ru/uplcv?utm_term=pest+management+in+agriculture PDF link annotation
    • http://www.allatpatikapecs.hu/images/file/leriribuvakeguziwufab.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/u4ia9ua11cbm320535a85l44mn/88311421258.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dcf16caee---89156575450.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/puzisupogumugebikakew.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/46889445912.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/77ab56f8f839c96da746634589a899d7/gaxiwojinijazopiwajak.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d2aa74dd296---10044570117.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/gederufemivimune.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/bebatata.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/3363908463.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/bigase.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ea459ff00---voliku.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/ladaboranof.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/54fa05d1120983bf1f192550d7f932dd/55156288565.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4f8b40af7---37294174003.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///67411613472.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff2923d3bb---61347946673.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/mamogixuferadorawu.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/ee0d979d6ec2b6f8d9990b084bc48251/23237623192.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/vanego.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_off0000e379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE379 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8B 17540 bytes
SHA-256: f0bf82497a0391a69e268e9ecab0016e5746e49e61ed2fe7c6eb9c0a836f9afe
font_02_sfnt_off00012945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12945 10552 bytes
SHA-256: b977fd777566ccdabb319f855dff52d59051a32c71946139069311018b1e95af

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