Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8952eb9c8d8ce9…

MALICIOUS

PDF

92.0 KB Created: 2021-09-02 03:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f4f1eef8d27a8a3b684e14c00006eb41 SHA-1: 22a1f2bc4e2828188ba8c7bda8506f98ac2e98b1 SHA-256: 6d8952eb9c8d8ce9e81193e97a5c63805cbbd9235703343ff1ff705acacdbb1a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is classified as malicious by ML and ClamAV, exhibiting characteristics of a payment redirection lure. It contains numerous embedded URLs pointing to compromised WordPress upload directories and disposable hosting, suggesting an attempt to redirect users to phishing sites. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly indicates a business-email-compromise pattern aiming to trick users into changing payment details.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://coretry.ru/uplcv?utm_term=section+351+statement+template PDF link annotation
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/gr10koq01i0faau37fga3kp5m1/35146521040.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/87326932617.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/7b443b566a3ef64b329a199a0aebffde/44433970470.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5e8f60731---nopupujiv.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/89807440436.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/7f86f32f433a914dfa202c0ccd9eff2d/57566880667.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/48e97502b93b296175a4b4c63122e378/80641152391.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/46077237495.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/12544272285.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4df2c0ad91---jegukugifa.pdfIn PDF document text
    • http://ks-puyuma.com/CKEdit/upload/files/wakufa.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9ba5b6cade9ec0ca4fcd723d8ebac843/xazovibabon.pdfIn PDF document text
    • https://cityface.cz/res/file/nujuvowijog.pdfIn PDF document text
    • http://gestmase.com/media/images/file/durokejawaperukuwexe.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076249aaf953---rufopatigagivun.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/75001935600.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/16609150394.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b785c7b0c4e---68199182804.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/prt8mr5ilaq9rc464g0106rk58/4365726368.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf0151ca41---muvomifejutemumavita.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/68163469088.pdfIn PDF document text
    • http://rayer.cn/d/files/koxasipalomuf.pdfIn PDF document text
    • https://bselink.com/userfiles/file/bonorowaduzepabobafes.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_off00010478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10478 10868 bytes
SHA-256: 5290d2b7043eccbdb7118fa1410b7bfe520008ab3c26db22e8c0329da0c45ba9
font_01_sfnt_off00011d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9C 17320 bytes
SHA-256: 788075c69d238b26ecf9e7a42b16aea4403c7615298e731c6b492ac2a1b3c74d
font_02_sfnt_off00014a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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