Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aacd82e441142dd…

MALICIOUS

PDF

110.2 KB Created: 2021-07-07 23:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 656062d6cdde8fabd1629c461d55ccd6 SHA-1: 772b15e8f2dfbe2452b94045c43b3cd59aa48b2b SHA-256: 7aacd82e441142dd855dc8c31052ceab5cb3d3e81517eb0fa80e4689c6c57cc5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://irlanc.ru/uplcv?utm_term=antenna+theory+by+balanis+solution+manual+3rd+edition PDF link annotation
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/q1p49rl0309rirehfgf7q3k0s7/75768788784.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/22222ecf2c0f0a6a5abcc3bff63e6a6a/taxetigiwiwuzomolorari.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607eaa355bccf---famofirejasulonobaso.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/e5cd88702dfdc358480a2a1194434c2b/mewiminipusizurijefube.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5628ef47e---bofelekazeredaguxexupawup.pdfIn PDF document text
    • http://sooclose.eu/upload/File/susudixorafaz.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/2c353386de8e3b3e487f00fd90303a7c/70582422044.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/doluwaralijebazo.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160881aa1d17f4---12496149762.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/bregft3b2gbdcomeqt0q604l5b/tizufemel.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/76aa125102a2645301bdd24ec0b4aa82/98168765081.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/i7clc8gl3sj53t6gmfi3m97un1/lulisuzaworitoxaluremusi.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/5e7e17126002a42afc500ce25c1fb1bf/22891760652.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/5c7sbh6c6gic400vmdav8kcuj4/rotubakababepokubugage.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/1t9je8s611jej45ogovm6fjmfp/xizol.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/vujukeson.pdfIn PDF document text
    • http://cuhs1981.com/clients/8/82/82ca37c076ec4232796cb58ed009bb3a/File/levavunejul.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/3d0b82ab491ff14c8bc2d20954eda0a4/gojavidowu.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/9c8783ff488bff5f1f0c4770ae0d9668/newenamonuwitixovasoke.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a12dbc3f673---68106671787.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d86131358---wuwagerofogaroz.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/691afcdd082d95382f0047c5dd47b7c5/mipusenokojezu.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_off000144ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144AC 11020 bytes
SHA-256: d85f9605519710b4cb8f592cc25322a6e6f762affdd811993ac07aeec985b6d6
font_01_sfnt_off00015e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17637 21180 bytes
SHA-256: 9488b67e541047442f98764b9442ba9923d3c9e745d8a7e827f338ef5e71a9ce

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