Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e49dd6692148b4…

MALICIOUS

PDF

87.9 KB Created: 2021-08-19 16:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 1f282c4bd190901d181e957d01b0ebc0 SHA-1: e4d67d4ced461c6eced8530de47dda2e7bb92ed8 SHA-256: 69e49dd6692148b4d3fe53d65feff8804aacbd68fa9eb31eb370700da1fc1e83
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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 http://uleshuzatshop.hu/files/file/4627840482.pdf In PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5803eb0be---33760826242.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/zusuzupitivoxuwu.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/14245461020.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/47789378203.pdfIn PDF document text
    • http://robedecreateur.com/img/files/begogujowe.pdfIn PDF document text
    • https://flexi-cms.com/uploads/file/57823874012.pdfIn PDF document text
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1626121596.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/15906320061.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071247986dea---15427929814.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ajmp0bbbrkmsfqa6ijdpubrno2/91254680139.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/narogafojawomuvareroso.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/89260848508.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160819e3134584---rewodujewudezojoxodoza.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/32729089325.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/k16je28asnmr60u9plr4ufbreg/16499176606.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4c7543d43---neriro.pdfIn PDF document text
    • https://mfdesign.hu/files/file/82719614800.pdfIn PDF document text
    • http://janandpoos.com/clients/872640/File/75195652139.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/bolunoguxiberek.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/3763272cbdaa3355de81625c13dfc50c/zofoxoruxoba.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2e25d9798---23165767168.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2dd5dd358---rekiwe.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/81337057160.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=resumen+del+libro+el+peque%C3%B1o+vampiro+en+peligro+por+capitulosPDF link annotation
    • 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_off0000ef45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF45 11560 bytes
SHA-256: 4424b2d033183db75b3c5b7e4a75527cd7cf613d30e8e9a332b0715e4804e799
font_01_sfnt_off000109b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B2 17608 bytes
SHA-256: ac2ab33d6d084b8421bfbc4a73f2acb83aa00eef710c3f8dcd573cb76cf06e16
font_02_sfnt_off00013630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13630 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1