Malicious PDF — malware analysis report

Static analysis result for SHA-256 6154a1433bd8472c…

MALICIOUS

PDF

79.2 KB Created: 2021-09-07 17:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 330ada2e08bb02706efa64f152be62ca SHA-1: 433726f47fdda80ea552a1a19e8d1bf63d08c9f4 SHA-256: 6154a1433bd8472c245125c391222fb760cf92c9cd79104c6de18df607773b97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous external links, many pointing to compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://pixomot.ru/uplcv?utm_term=etronix+powerpal+peak+manual PDF link annotation
    • http://asfalon.com/__files/file/18303701749.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/53633812480.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/50654924028.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/sobuduwarofuxapimo.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a243671b1e3---50990314243.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0c9ab3aec---fumowetigokisamabofovaxo.pdfIn PDF document text
    • https://egf.tw/test2/images/file/69584902688.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c76d78def7---15531883137.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/72784125300.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/dadotepofutizuruvowib.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/9tmv9vkh6gmnipmlp1l7tafcla/fewiv.pdfIn PDF document text
    • http://4els.ru/uploads/images/files/rusolufitujuzuk.pdfIn PDF document text
    • https://drsaman.com/files/8216466526.pdfIn PDF document text
    • http://qwerty.pl/_data/file/gomumukudame.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/613298bdea2ad1119788fe7319ca0600/nitagurefuzalibexodevo.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16093b26ee4586---50697348412.pdfIn PDF document text
    • http://adec-interiors.net/Uploads/file/80770412386.pdfIn PDF document text
    • https://whereestar.com/marinarubicon/admin/file/65879432645.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/34h0h14crln62njj0sdsjif5j3/nakirazivibotipojejix.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/sigamelobumulaxelas.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/0145d9018650d6cd1aabd4c1ea4fa717/bobavebagu.pdfIn PDF document text
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/65608752551.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160e819c90c8e9---52556444310.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_off0000d06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD06E 10608 bytes
SHA-256: 4f5f6aba3ebfa4ff6628193305158cc28538e817c5af59ce77841f1804983f29
font_01_sfnt_off0000e8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A7 17728 bytes
SHA-256: 6de1e284c90b285ab36c7e0b2cef2d89d7125e53c4de24f128bb8a6e40284664
font_02_sfnt_off0001172d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1