Malicious PDF — malware analysis report

Static analysis result for SHA-256 583692eeb80014c6…

MALICIOUS

PDF

89.0 KB Created: 2021-08-24 23:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1e2ed7eb9b18548c20d63c9209abe3a6 SHA-1: fc20f8bd1192e8da700b483025c59111247ecdad SHA-256: 583692eeb80014c635f68c5856d33105907ef5e8cad3797292ace47c392c8cde
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed for SEO manipulation or to distribute further malicious content. The presence of multiple external URIs and link farm heuristics indicates a pattern of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://x04ydivan.ru/userfiles/file/65519151373.pdf In PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b085bb22418---32605507965.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210602_3EB6EDB253F024AB.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/bipulosutiberopobexelu.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d4bfdb19d---12421526739.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/fusorimevusisalogorasadu.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/fexaz.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/53735988183.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/8cef6b96718ce9970322e6e430b2ac01/tutelel.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/6mr2n8p7bqkidmcahdlkskr076/pafumuxuvizukiz.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/givedozelulube.pdfIn PDF document text
    • https://lusagroup.mobi/images/website/user/files/bonuneloxotiviwepaw.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/5ee63a2cb8ffbeb443e6f0254aa081a0/39182989941.pdfIn PDF document text
    • http://handgun.ee/media/file/19658547303.pdfIn PDF document text
    • https://cristalensi.com/public/File/41570047398.pdfIn PDF document text
    • http://ave-france.com/pics/files/firimonobilebigijol.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/tasepamanexula.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/46518367932.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/s1de66c9hd5puvc7t2lofdtmmj/pexigabifilabu.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c2ee64f7e---35704259757.pdfIn PDF document text
    • http://bjjiffy.com/upload/nipenewepowixaxixepowum.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/nafaromedolifap.pdfIn PDF document text
    • https://automatisme-portail-bordazzi.fr/fichiers/nibitimudasutojuporo.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6337ef73a---nopalexudazatazalikifukop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=eamcet+maths+chapter+wise+questionsPDF 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_off0000f777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF777 17196 bytes
SHA-256: f94e9ef5826cd895c5d3837605ac7d747388e431fcca28bbdb7dc46e28edc5e0
font_01_sfnt_off000124c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C4 10908 bytes
SHA-256: 292c7cdb4346a83c62dad0425eb044b801f603e6d2aeeb57241d942246e8d488
font_02_sfnt_off00013de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.