Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64c2d6f16ab220d…

MALICIOUS

PDF

99.5 KB Created: 2021-07-02 04:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3418e40c005d28382ee9947419a0bee6 SHA-1: 8c40e9908068a1282eff9b9785c437bfb2d7ee88 SHA-256: d64c2d6f16ab220dc1c001168ae24bfcd161ebe2abeb58a8c7d82a6bdda2ae4e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. It contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves leveraging these links to compromise users, potentially through further phishing or direct malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=hailey+on+chicago+pd PDF link annotation
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16087bbfcd9097---1998069647.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/rhp9rjacqpup522845lt929to5/koxijajawedifejolopudeve.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/44798690380.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/lbhlgjcgmslafh9fdhe3sdmtmp/mowafabegumu.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/pesovewususudapovavazu.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/acc03eb032c7c719a6a8e02ce8292b2a/sofakejabakikileka.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/2962hva3ltu8to1gh87pbbf0a5/47302067378.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/4b51e75e0e8f53878ebbe1235bce7687/74343411022.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49f2212e04---25921103659.pdfIn PDF document text
    • https://lesura.net/userfiles/file/bigubilemibog.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160824012a71c1---davepa.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/35a328d9580ebf20eac745f10f806440/jamepubawibokun.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/defiwatumobopovi.pdfIn PDF document text
    • https://wineart.online/userfiles/file/28304852371.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/ed8404ba388204afdeb9b2d7ff8010fc/rurovuz.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/71958070731.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/ok0s16vitk8v2velms06hluqti/xovamulipij.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609685a5752fa---12693079031.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/959f77ef8b2837eea6c6387906cd5ae9/lapijutujogiwewaj.pdfIn PDF document text
    • http://beergolfers.com./blog/images/file/bejagutafili.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606c880d1a4cb---79632596649.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099faa3ebb01---tuluwizawoxewijez.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/0ouit49i7vg4js3lln2ouan69c/kotib.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/19632641401.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/33591740058.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/9159351b2ca7997040df452e38075319/fopag.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_off00012554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12554 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D6B 10532 bytes
SHA-256: 7554c4f649b52f06bff02417a70b32aa909773ef7474e42a06f8928550a225a6
font_02_sfnt_off00015508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15508 17072 bytes
SHA-256: 4b3246d5fd309f2131b464a97c955b928f4e9b7b8a7d5d5795eb5163f4e82bc4

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