Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dfa351326c154e5…

MALICIOUS

PDF

88.7 KB Created: 2021-07-02 23:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3c6cf246c8a05d4dd8247a044ba40291 SHA-1: fa208abb9e704e5b471e63fbb92f321e07fa24e7 SHA-256: 7dfa351326c154e51d15ae9e790387b885ad0bf2e98604159d9b1193ab4c90da
196 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The 'SE_CLICKFIX' heuristic indicates the document likely employs social engineering to trick users into executing commands directly, a common tactic for bypassing macro restrictions and downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://smidgel.ru/uplcv?utm_term=hack+for+tank+stars PDF link annotation
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/6a33653930e2a84111841f60e34a3791/pupisopamuxoxinazugupe.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/55211aa407e25cbe7284473f93ce3b2e/puwinirejudavexuluvo.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/3b4cc76b41c4dae518318138b1059d87/jifapisevi.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087fab11a0bd---teledovoxilapolenudapi.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebb039b3ff---riwexu.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609059f110acd---vepofuzo.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/de35c8008ae8dd08857fc00967756fc1/xetepezusalaberudabujomok.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/b2cf9efa9a324efd3ddc8e2cd5ebc8bc/jopisojurobon.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/degiv.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/72510360093.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/2f076838f789e4d5b752d88daea2a74e/rabijava.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae31a99c2d8---52310994046.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/xilazekejekuramudowezujog.pdfIn PDF document text
    • http://lucann.com/Upload/file/23942044575.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/kijabu.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/woxiropazow.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/17577116371.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609887823ff75---forit.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/010626111476.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b657769e06a---93967155417.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/2812256675.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/7mshlrqjf69knvc6bo6ium6ntr/64089236184.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/9004d063ecc48539c4a122f512ef9fd6/wiborixopigojojubanomon.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b9f40faaf---bisonigoluvunawevozi.pdfIn PDF document text
    • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/kegegetebifo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2D 18476 bytes
SHA-256: bc215560de9d204b83f051e514c47c13acbf11e624096cbf672bb059727019bf
font_02_sfnt_off00013ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EC0 10144 bytes
SHA-256: 87d24f41d52002d5c0d0d3f0ec8ff91d347be878b5fe0cc783809f1e9d8dc6da

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