Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3fed2d8c613637…

MALICIOUS

PDF

86.3 KB Created: 2021-09-05 13:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4571370a85e337c16b1fd7c6bc1d5be8 SHA-1: 356de8b57edd97607ffe83387c021ff63b06fb17 SHA-256: 9f3fed2d8c613637b7be03a87ec25c10a9dba2733a72b24ced1139389c3e2eff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised CMS upload storage locations and disposable hosting sites, suggesting an attempt to distribute further malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign designed to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://0900107678.com/upload/file/wufipe.pdf In PDF document text
    • http://tscyw.net/userfiles/file/20210725054256_id1t0v.pdfIn PDF document text
    • http://makingthegradetexas.com/clients/d/d4/d4716c73f098ea79da165a2194b6736a/File/25718487975.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160763e7d4692a---xofunujagogekebigafawibeb.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/383e0709f5e683046fd5e73d0964186b/37090741965.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/17476043198.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d45faacaafac7544b5ddef5ddfd0413c/pefulopesibijadu.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/dapimulusawojijezive.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/22393469687.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160840f8e72e30---sogajejalekuvigor.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/fojeso.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1fa29cb45---tujovujopijufubopolagat.pdfIn PDF document text
    • https://premium-house.uz/images/file/voxitijonowebidow.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/432bb7e006b3d2884eebd09b507a1958/dobejetapofetukim.pdfIn PDF document text
    • https://kueapem.com/contents/files/48809885859.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/vjn50l781l14od622h14ukejs4/68675247554.pdfIn PDF document text
    • https://airbays.com/userfiles/file/2974715893.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/43a9752c569f3cb7c4d371939cad260d/89074263702.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/vexewesorakenaroxunekitad.pdfIn PDF document text
    • https://uniontend.com/userfiles/files/73942008361.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a23083f906---85140560692.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/83688081489.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=getting+started+with+react+js+pdfPDF 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_off0000eb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4D 10988 bytes
SHA-256: 92de4542954c4cb922af05ae54ba72bc6d9776c197de3ebcec41cd69d1ad8476
font_01_sfnt_off0001049d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049D 17500 bytes
SHA-256: 74ceb89795c0f54ae3f49f0769cc0151219bbd65f6b941a5d76134e4a6f40d9c
font_02_sfnt_off000131bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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