Malicious PDF — malware analysis report

Static analysis result for SHA-256 7352e596557f8cd6…

MALICIOUS

PDF

86.9 KB Created: 2021-07-01 16:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a30d235689493743593b613a89e0f28 SHA-1: 593a67cb0f9ecb8c13bceed01e75d37f7e4d0fa8 SHA-256: 7352e596557f8cd68a7210b8ea3f54754898200719ca13e85f18e107afa8593a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely designed to host malicious files or redirect users to phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16099753ebd8c4---nolitekapomurajifoto.pdf
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/59570049546.pdf
    • http://alarcon-v.com/editor_upload_image/file/80584555135.pdf
    • http://sklepjola.pl/userfiles/file/55172139228.pdf
    • http://qca.ch/userfiles/file/suwevajozalozegosu.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/1a4f07662c6a375101750fe2f2104f6f/tagijobajisulizil.pdf
    • http://ohappy.org/userData/board/file/78821265946.pdf
    • http://studiotecnicobonoli.com/userfiles/files/sibidujusiponeponulewa.pdf
    • https://quaint-house.com/images/blog//file/wonunijerijajujuwowan.pdf
    • https://nepalipublisher.com/ckfinder/userfiles/files/11064696488.pdf
    • http://notariocprietoa.com/notaria/documentos/files/madijo.pdf
    • https://roomart.uz/ckfinder/userfiles/files/17752416.pdf
    • http://emrc.ie/upload/imagecontent/file/52831523908.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/me1m5oh2poe116ltak6qh6gnt4/vaxizuxubedafivarilujuxot.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7888899e2---voralevejuvuke.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/a0b0fc8b695a6fd470a517a4e7248cf8/nosetobenewiwosero.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/a5nht2p8vpvb95hi6msuoj04u1/26827317104.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=concentration+risk+is+assessed+under
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f07c.bin
80d31de71f2f4e40b1f85fa46ce5543e274c245c725256b50e7ca226017a36e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF07C 17368 bytes
font_01_sfnt_off00011e44.bin
48e2f4f83b8329e6e225409c25049928686054b3c46f5b9b1c09f61832858812		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E44 10540 bytes
font_02_sfnt_off00013677.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13677 16792 bytes

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