Malicious PDF — malware analysis report

Static analysis result for SHA-256 90131298ca82164e…

MALICIOUS

PDF

94.0 KB Created: 2021-08-14 23:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 04742dfc1f228f339cf4aad58d8b3cd6 SHA-1: 5163d2321fb38cdb16638dc3244e0ff80193fee6 SHA-256: 90131298ca82164e18bda91ec6609c58a9c99d6a6997d9d421ca71e645f13a50
196 Risk Score

Malware Insights

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

The file is a PDF that contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the document's content is designed to trick users into believing there are new or changed payment instructions, a common tactic in business email compromise scams. The ML classifier and ClamAV detection further support its malicious nature, indicating it likely serves as a phishing or redirection tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://huntic.ru/uplcv?utm_term=how+to+renew+pmp+certification PDF link annotation
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f79cb6a18---zidoxinupoleru.pdfIn PDF document text
    • http://tulsamemorialclass1969.com/clients/8/8b/8b8b36ecbaf17f244e47af75a29dfbe2/File/sigukapovira.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/f442ec84e14529f73a52368a51d0f3d5/20377363795.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/xitivesometijiviwanogi.pdfIn PDF document text
    • http://chamdure.com/DATA/files/xifapodirularib.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ee8d4a4eaa4---94800241635.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/43478072147.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071670bb4924---bifavofatofoxiwajeriwi.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160747dcd54667---34024495029.pdfIn PDF document text
    • http://inspirationforexcellence.com/clients/66491/File/6483867235.pdfIn PDF document text
    • https://carolinevlieghe.fr/images/file/54366045658.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/lajeroxegeneluniguwifi.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/139184422ecddabb289bb38b16d690be/kawizodijejakuvelego.pdfIn PDF document text
    • http://myredm.ru/uploads/file/55466303882.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/ffe4fc3c54365a8fff2ca78e6b3027f4/kabuxibatatex.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082acfcd2120---11827211162.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607835475ff66---runanigarodeweponeleziwaz.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/sogonilitizep.pdfIn PDF document text
    • https://fivetc.vn/uploads/files/ratibufagutekedi.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0fec4dff7---32063773347.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/30634398632.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9ffae0d0fb93bc69ac72941de9cd8362/52204472585.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
    • https://www.pmi.orgIn 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_off0001094a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094A 17672 bytes
SHA-256: 5fc98561d3d43cd3e4c32bbe242f580ea37e4a84d357cf6af44f1211fddb4f09
font_01_sfnt_off000137ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CA 10504 bytes
SHA-256: b4c3c695a893c07ec53a9d81902bbe0372e5b155a8aab2e6d8d41cc9a79abb41
font_02_sfnt_off00014fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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