Malicious PDF — malware analysis report

Static analysis result for SHA-256 704de83004ff8851…

MALICIOUS

PDF

94.7 KB Created: 2021-07-01 22:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8df93eb9011d7add854362aa74562ec7 SHA-1: 8cf6cfbc880d4d7a22dffae63c82454bee43436d SHA-256: 704de83004ff8851c9981f40fd1d087110b349dcab5c6bb343dc88e9c95b14f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://wastran.ru/uplcv?utm_term=steel+building+construction+manual+pdf PDF link annotation
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c03eb1194---zidorezemefapikumuwovuva.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/42ea2cbda211e34fd53751a1e29f8aaa/wanijutomazujiwonaji.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/lm587khcc23rdtaph1fia6ss6n/36319632214.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/4ef35f949d23d283337fdeba98c7478f/7974340496.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/97c33b41d8fa9d59d705cd0047487ba3/sewalinokefogole.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/6093b2aff6096bf3c00bda1246d0fd6e/zuriwunizob.pdfIn PDF document text
    • http://iberia-ex.com/images/blog//file/69583219036.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/0dh5u1uol3bkrcaj5inl86daen/perewaxatelevudejelofeso.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/24258629952.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/d37b24b300e8a57ef38223ea3103de8c/fijezowoxug.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/5df491c5bc6e69de3e24900f73e8eb10/bosed.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021051520434373499.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/gafiloraxuwud.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c28d75584---zolugudusolafa.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/vovaxis.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/muvagidukebiz.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/vobusiwunovotasewebi.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/43273167375.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/76553251916.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/03edc436bd8c6aa87b6079623fcbbacf/31385196955.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7dbff335a---70475892404.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/gazosijolikuliwokob.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160750056f0f02---35318656147.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_off00010c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C04 17924 bytes
SHA-256: 6608cb4e5be609e7a407ea9ad920b34e0369e3dd10119cf075fcc9ab522b01e9
font_01_sfnt_off00013b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15373 11280 bytes
SHA-256: 2263e995cd1826e14b679e87526e84e608877fed057e782f8f03201facc528c8

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