Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5e8cdbebb6c8fd…

MALICIOUS

PDF

81.4 KB Created: 2021-09-07 13:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dfb72dadec979b82813f45e02bd523eb SHA-1: d44a896f455f2b23c21f9a1426db9d281d0df5b5 SHA-256: 2d5e8cdbebb6c8fdc17456f542f7267a32f2930ed30b2adcee64147d855b1788
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://allytemp.ru/uplcv?utm_term=olympus+omd+em5+mark+1+manual PDF link annotation
    • http://duoctruongxuan.vn/userfiles/image/file/96307879509.pdfIn PDF document text
    • http://dallassymphonyleague.com/clients/1/14/14bb4a025281f1a32078cb68571f7cf3/File/97919171940.pdfIn PDF document text
    • http://bluefield1966.com/clients/26642/File/75384078273.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/lmk2dph5mrdgdm7t7ni5744an9/47102165916.pdfIn PDF document text
    • http://southerncross-ex.com/images/blog/file/sefinopubujutukif.pdfIn PDF document text
    • https://kawanmto.net/contents//files/sibalidafafejerep.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/lt8641b1q0dgimdtg89jtn5vqr/laxitomogovi.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16118a6aee4b2e---josedudotugituzex.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/jubodelakorimafa.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075fa395d0be---mawowusekexe.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/jawenu.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1ca0a90f3---komupubenanari.pdfIn PDF document text
    • http://georgeandmaryjones.com/clients/f/ff/ff66b05efb8f16ea353d8e6908bb1429/File/6937205567.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202106/file/sokotudikelaf.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca61008350---mifabavogirosabedinewufa.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/50412495938.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/m5e34aebbichhr2muqb65ielvn/33417709262.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/tufumivipozisimowanaxo.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/4857636937.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b6a35c468---nagufujabefavu.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/52904987338.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3ae6642cc---megoka.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/87094248610.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_off0000d6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE4 10880 bytes
SHA-256: 55dcb15172be810d0075c00e6b848be2524b245eec8471671de6732b792e00d8
font_02_sfnt_off00010827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10827 18188 bytes
SHA-256: 5b599bd3af2a39fba68192bcdc3328c1545245d4811376f030b5d786b77f5957

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