Malicious PDF — malware analysis report

Static analysis result for SHA-256 155e69a66e1e274e…

MALICIOUS

PDF

69.7 KB Created: 2021-09-07 08:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 71b32b4eb93230635094a300b007acd4 SHA-1: 87fa877f8da8133c984618579c31ef65208ec3bc SHA-256: 155e69a66e1e274eeca177d6922115706b74e9cecdbc3c47d1bb95a2e8586dce
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including an image-only design and embedded links pointing to external URLs. Heuristics indicate it's a link farm on disposable hosting and potentially points to compromised CMS uploads. ClamAV and ML classifiers confirm its malicious nature, with the PDF_IMAGE_LURE heuristic suggesting it's designed to trick users into clicking through to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://inwebjor.ru/uplcv?utm_term=requirements+for+registering+a+company+in+kenya+pdf PDF link annotation
    • http://www.ecostroyservis.ru/File/fexoronom.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/90938379793.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/00d4d5742f298ecb0df2086e95b7dec5/bevitoperoz.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0fb7671f6---22904319649.pdfIn PDF document text
    • https://tefen67.com/userfiles/files/35954378692.pdfIn PDF document text
    • http://metall-press.ru/files/petemite.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/37780256977.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/kajajoxexubimabelewixa.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110dc1cba6f1---16972380402.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae741adf79a---8099692452.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/q0f3i3ak708ieoelvg9n17eis8/38461226860.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/76980331095.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/fnj1n5jgfe8kp43hbi8k3ig750/sezisaguxifuw.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb72057aa6---11973314241.pdfIn PDF document text
    • https://inprovitperu.com/ckfinder/userfiles/files/61916683808.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/vewuvigotesotusara.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c47a37ac1c4---volarujenevajaninupagu.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/2479147e9c830f7d5634098f2e67df40/xijonaxopi.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/goguk.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210611170713.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/libof.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/gesojovuvugupavizaket.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/91890643097.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_off0000b3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB5 14016 bytes
SHA-256: 851beb8b437bf78b8f143e895d2029396356272c311a74a4663eea91fda0d00e
font_02_sfnt_off0000ee03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE03 11412 bytes
SHA-256: 37d57ef01f06a9af44a7ab9db436bf5a4ef8ad99b98d82450a50faeda9ebef6f

Open this report in the interactive analyzer, or submit your own file for analysis.