Malicious PDF — malware analysis report

Static analysis result for SHA-256 febe11b3615d9be9…

MALICIOUS

PDF

81.9 KB Created: 2021-08-01 08:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 455bbc4eaa016fb0a4233af76cc8c367 SHA-1: 358b945321dd57010c7c6574994a05b571d5d66e SHA-256: febe11b3615d9be99d1918940a3785990f4541604363cc13f2759f20f77af060
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 multiple compromised WordPress sites and disposable hosting, attempting to trick users into downloading files by disguising them as driver updates. No scripts were extracted, but the presence of numerous external links suggests a phishing or malware distribution attempt.

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://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ecece938b93634088c50dfa09bf145a8/72174160351.pdf In PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/a2dee7d29608c0c7c9f3417be13fe1a1/tezesapiwuzutoselas.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/38745717480.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/70821013305.pdfIn PDF document text
    • http://ruresept.ru/files/file/70667332337.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/74701253410.pdfIn PDF document text
    • https://plasy.com/uploads/file/21033538234.pdfIn PDF document text
    • http://schokozentrale.de/idata/xopozomonubomogogunolupek.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/52761502156.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de723ae9ea2---jelasijifisonatu.pdfIn PDF document text
    • http://adveotec.com/img/file/98387174773.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075b33c511b0---1695729117.pdfIn PDF document text
    • https://ivanamihic.com//files/lasutef.pdfIn PDF document text
    • http://kwartetproforma.com/userfiles/file/luzujedubugoruvavorotu.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/fotaveba.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/b90cafa5c6b855a785866fd7eaf31f09/kililanepejuterebi.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/5kgvlbr9nhv0n1mi6u0to69q65/65622026628.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/dbgnptgmp4hgh3ree4440g0e7n/45920933913.pdfIn PDF document text
    • http://xn--kprq5pvqklteonubj6c.tw/CKEdit/upload/files/megemituwa.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607863a8237a2---71506839245.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/k194cpmn8tpuc5s9opmeu6djc9/ladosogerekoziju.pdfIn PDF document text
    • http://avandcie-energy.fr/ckfinder/userfiles/files/gasusokovuputimefek.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/werigepaza.pdfIn PDF document text
    • http://dkyangmei.com/uploadfile/file/2021080106441873499.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/61448787227.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/zomazujojomep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=canoscan+lide+25+driver+for+windows+7+64+bit+indiaPDF 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_off0000d363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD363 20140 bytes
SHA-256: ccf73484d81c2a2c757bd669bbd51a66e553c3864a0f67fa8e9b7698ade95a6f
font_01_sfnt_off00010623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10623 11340 bytes
SHA-256: 06aaf4941a0c17f64f66f8e0c59e1ca8736c396cd5ffeca43e4fb89b071f8de6
font_02_sfnt_off0001213a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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