Malicious PDF — malware analysis report

Static analysis result for SHA-256 79af07771f0c19e0…

MALICIOUS

PDF

79.6 KB Created: 2021-09-05 14:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c322dfbd2e6e2e8d7a1222de811de8c0 SHA-1: 47c884b155d52d6a793f349d47ef7321f9dfeffe SHA-256: 79af07771f0c19e0d68798b718efbb06081a6d493a12766d13f58c6b4584d702
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, indicating a likely phishing or malware distribution scheme. The presence of multiple external URIs and link farms on disposable hosting suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://archism.ru/uplcv?utm_term=ap+state+govt+schemes+in+telugu+pdf PDF link annotation
    • http://thaihotelsale.com/FileData/ckfinder/files/20210808_29CDBC39425EFE76.pdfIn PDF document text
    • https://rentcar888.com/uploads/files/202108151518025672.pdfIn PDF document text
    • http://byecook.com/ckupload/files/gepegevime.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e6a174918---92429057963.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/9150945518.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/1c4dee4ee2d984f2257761b9f93ced1d/wafazizat.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202104/file/24449161066.pdfIn PDF document text
    • https://aashianarealty.com/file/80589453144.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bef38443b51---6152705129.pdfIn PDF document text
    • http://st03.it/userfiles/files/figaxojafis.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/80920944503.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4f8fb210f---ninigivufejelijuvan.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4867aa2b5---jewexesenidegizazume.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/53610724202.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/b9d4d75f88be95113f4c78f4ce9dd4fe/futefutu.pdfIn PDF document text
    • http://tencanpowder.com/d/files/52370312513.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/xesodopa.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/livoxobuxu.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887483dbb19---56044231629.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/e8919d97f84a245878718410757bbf88/wubumixux.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/n5og22efqr1fuj9o22lhr0cv71/82083540410.pdfIn PDF document text
    • http://inezorviskids.com/clients/37546/File/ladode.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/fdfe92bfe5d3f14e5bf526c408a2679e/laseturuvisupisumuzigavo.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608e40d6b2ecb---bibumabotunod.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a899a68f2d5---jesosifirekedikovipukutin.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0090793ce8---dugudeb.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ced2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED2 11116 bytes
SHA-256: 1eabedb211962782f8765836a946d674a7472e293aba60e8f9ee09d9a5cff2df
font_01_sfnt_off0000e86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001007e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007E 18120 bytes
SHA-256: 759f5ddf67b291d38215447f464df226556137a1ab0dbf63b6b3e0b67429887f

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