Malicious PDF — malware analysis report

Static analysis result for SHA-256 3530214e75f16ad1…

MALICIOUS

PDF

77.5 KB Created: 2021-09-13 19:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2ce73c1b872d2b541eaee9da1e5022ad SHA-1: 1d94dbe053c5771dba5d4c9b8eb52bcbe9a46098 SHA-256: 3530214e75f16ad19b8aa9eb61a07703b2bbfca8033c4342e98d99c817027f6e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically indicating phishing and trojan activity. Heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://krisoc.ru/uplcv?utm_term=coc+hack+version+happymod PDF link annotation
    • https://agrando.cz/files/file/lotefaxol.pdfIn PDF document text
    • https://avukatwebsitesi.kocgrafik.net/upload/files/12916709984.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/36126645369.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/jevisipazogavunava.pdfIn PDF document text
    • http://oppedisanorobertosrl.com/userfiles/files/rurafojowewenekak.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f402e55cd5---kixatosifozanefepodinud.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/kolisiwijilisuwujafevina.pdfIn PDF document text
    • http://getvisa.ru/images/File/ruvavozejodotudegunufis.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/jivirapanikelukix.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/31961920436.pdfIn PDF document text
    • http://laduses.nl/image/file/rizuliruvutot.pdfIn PDF document text
    • http://suchanekstomatolog.pl/files/file/namamiwoj.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/mikoxuwakofikux.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/rafopawovemaxadufalel.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/3a3eadp17n333t6out5dkr20g4/wuxubuxuj.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/jomimiwunobudutapinut.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/28631721438.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/ild81kbj8633jo63clqbkdiccv/detupabakogofo.pdfIn PDF document text
    • https://mimpishio2bet.com/contents/files/bunuxutanejasi.pdfIn PDF document text
    • https://medbillings.us/lightspeedweb1/file/togubivifuzozilogi.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/ed3c4eaa95930e935ce672df0baec0f1/vekiludasum.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/jusamavawul.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/3e2deeff3dd8669cee9822cb4a0347cc/zimeg.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/33583192353.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/3927790935.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_off0000c9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DC 17220 bytes
SHA-256: b0058c14aec685c29ffdb278ae53fe187c812009c1ad255e71aecce870b6fb93
font_02_sfnt_off00010efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFB 10940 bytes
SHA-256: 4746d78109d7668c0bc5a894f2b29d5febc037a3c6ef53ee51b2d4048d1cff1a

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