Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa5a68d375943e6…

MALICIOUS

PDF

88.2 KB Created: 2021-06-30 14:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6bd9a09cdf95a693d4aaa9db0f0a1552 SHA-1: f48c942d56243289d52629b033eba80d527c95df SHA-256: ffa5a68d375943e6ca75d48cfd439c15d9e40d2f20b342bd035cf24f03b98496
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous URLs hosted on compromised WordPress sites, which likely serve as redirects to further malicious destinations. The presence of external URIs and a link farm structure strongly suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://medvor.ru/uplcv?utm_term=diatomaceous+earth+and+cockroaches
    • http://inspirationforexcellence.com/clients/66491/File/91781410004.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/pqtaha8jhaerotsapi7r1pr13o/kudolazuru.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cdd5996e1---23635851703.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4eee0e95b6---jewaxovovuxogalulunuberu.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/qm1hhoccf4nl9v2bmf4v5d0t2l/32374054560.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/812256c8c376fd1df50e366a64f7b4cf/31885495536.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/gv446afm854q768580g716v3c6/14640208114.pdf
    • http://g-shocktou.com/user_file/file/reliwepirimazedizewawun.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/q9m0uv9ear6d8sevrndocl0s0j/87689997112.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/4muanl8o87m5qtsj7tupu5a3lq/tuwoximinabogufokobibere.pdf
    • http://nacyc.jp/Upload/file/8135269546.pdf
    • https://oddluzanie.net/userfiles/file/18155723499.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d572415051f---98917213365.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/vs3uflqllekq4iamqpdqok2tpc/77743179190.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078e497d804d---kodubasuzev.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/a2262d074238b14cfd318cde31911426/rujabisexas.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a4d94c452---jososigapapikezajoporov.pdf
    • http://telegid.tv/userfiles/files/fireluwoxuwevidenirewo.pdf
    • http://petraifevronii.ru/ckfinder/userfiles/files/48102418893.pdf
    • http://lorichphoto.com/pictures/file/gagufoxakopigazojuxa.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e34e20e425---matewupige.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ee87d4b1e---mivagofujaxalokizebekose.pdf
    • http://koryosushi.com/uploads/files/jarenoramumirulanegova.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/thd2qb1nmocjuksmo7n3sjvjd7/wuvupefemivibowapegilotu.pdf
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/a8ba95b2339f69780a984dce580dd440/83217266758.pdf
    • 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_off0000f594.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF594 16792 bytes
font_01_sfnt_off00010dab.bin
758d80ba51ae371346ecfcbc9b7db17b6c01f0c312ca0096ebd288f2db859f6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAB 10780 bytes
font_02_sfnt_off00012653.bin
76ae80bf2258ca0ce1d48ff9fceb697be525e60c5f98eb4e79c0c39d6f56e20c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12653 17412 bytes

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