Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94e3fd551eea912…

MALICIOUS

PDF

94.0 KB Created: 2021-06-30 04:35:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 59eaf744ae80ac4967424cb9f1f34500 SHA-1: 10eff1cc3f88279ec416202b28ebb9f5c5a73f9f SHA-256: f94e3fd551eea912b21b3dee2b012515a2414704ca308ddf637dc14bd756c095
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.chatanakonci.cz/userfiles/file/19158965144.pdf In PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/b841334f01c30e445f476f25d7dcf0c4/89672664485.pdfIn PDF document text
    • http://yuha.be/_files/file/wixowojavalotifoboxerek.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/25777197232.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d428bec09---pojuf.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7317300bf0f645f62dd7370b10ed3e49/87514456191.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/82474a5a385254a2a7a3a5de022bc0d7/bulobolaj.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/tasotuzegorib.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/22565464765.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098392c5dddd---xuvoralemim.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/7467b3ffe9c34e41cd71e26893547395/50199780021.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/58c17cbb666c2ba9a75e52f78d65074b/jogajotawutizuka.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/6431f842f5863eaa015f6e465640de8f/ditigovope.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/jolonolok.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/q60gcj89mlcam5vu9gfhm73nb5/vuvub.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/7d56d2a55995e278f4a1bd3aa1130661/fugum.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087539c646ea---mexepovaso.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/95c9e7f74d0fecc54aff6a874577d4b2/xodaxot.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2d701ecb6---74058911659.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082f781db188---96158631450.pdfIn PDF document text
    • https://seikico.net/img-tym/files/50180281128.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/lagidipokizotigesi.pdfIn PDF document text
    • http://builderall.info/userfiles/file/42993697999.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=cooking+frozen+chimichangas+in+air+fryerPDF 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

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_off00010944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10944 10936 bytes
SHA-256: eca023652228b5fe9331905bb04c96a74c1edfff6d5f76a6db7dfb972362b80b
font_01_sfnt_off0001228f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA1 18532 bytes
SHA-256: 501e730c564ac70c4542f427586d9f6da5e2371d369d3788969f862b2909fac6

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