Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4002c9a222606d…

MALICIOUS

PDF

81.3 KB Created: 2021-10-07 19:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3969287a0d7eddcb99f55fc2d8e54bee SHA-1: e321496de5c2fc8c37408b031562b9b5309223f0 SHA-256: 7d4002c9a222606d3bed253410dfbdc08556a4df383589bdbef1d5f0e76ba9c2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains an embedded JavaScript stream and a large number of external URIs, many of which point to compromised websites or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded JavaScript indicates potential for further malicious actions, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=manifest+meaning+in+tagalog PDF link annotation
    • http://koszyczarek.pl/userfiles/file/19734544835.pdfIn PDF document text
    • http://mtegl.wsystem.sk/userfiles/files/vuturejaxukijavebaru.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16131ee246588c---pozolujozenuwobejazoz.pdfIn PDF document text
    • https://thibiditrading.com/public/userupload/files/35930979479.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/negijinozowideme.pdfIn PDF document text
    • http://machulski.com/public/file/lukugufubatupunenunikir.pdfIn PDF document text
    • http://rs-entp.com/upload/file/9929977245.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/kewuluxarilulemile.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/sawik.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/eff30138221e776a2bd92849d9d3101b/79442432205.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/gegusekanilowoke.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/gg8i6l5habs6kf5ttvrp4taeln/55115308733.pdfIn PDF document text
    • https://yaofangpeixun.com/upload/files/90732909881.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1615a03f049742---xonej.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/pegor.pdfIn PDF document text
    • http://wmsone.com/eimages/file/pamisafa.pdfIn PDF document text
    • https://excellencetogether.com/img/files/file/97140877352.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/45740158907.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136645aa5757---mamedibizimofapito.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/082310141625.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/17893918405.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_off0000d47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC91 10452 bytes
SHA-256: 5609e7818671c38cf364db0845df54f9307631ee5810f2289a37d3a2d31d39d5
font_02_sfnt_off0001044b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044B 19752 bytes
SHA-256: 2e621f0fd8037cb07eef6ee0473eeea8137080dd47bcf883133a414d25c1a8be

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