Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de476cace1897ca…

MALICIOUS

PDF

86.6 KB Created: 2021-07-08 01:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 89b335f4a3ca2c010d901357d65fca2b SHA-1: c37d809610a0de78cb0bf387e242a347ae44ebee SHA-256: 1de476cace1897ca6a23968d672a0eeb6a1b6d3bc3a485d5a88b33de5c6521eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, many pointing to compromised WordPress sites. The heuristic firings indicate it functions as a link farm, likely designed to redirect users to phishing pages or download further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://krisoc.ru/uplcv?utm_term=a+young+man%27s+thoughts+before+june+the+16th+poem+questions+and+answers
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/c3f704dfb75107ed78ac65e1e1d7df03/14015047500.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5b6732e5a---gexazovutanulake.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bc299274b---ruzoniniju.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/5f68aee765f05f3d2e6d36fb37abece8/21671359179.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607df4f302809---82777964705.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c880fae6f9c---76999842535.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/970fbed5c705e768e1796aef9b9dad8d/37352587911.pdf
    • https://mumegram.com/userfiles/file/78346584000.pdf
    • https://psfund.org/public/uploads/files/cms_files/tokopizufolenogepakexatu.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/v3m3s65chkvrglc6omdd1uu81c/jabevuwemazagoweviwiren.pdf
    • http://portalcom-b2b.es/img/user///file/_0479336001620082967.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/70c1a3196c3cf7c32fd2301684cf35a0/48428769079.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/814ee9050d92fe4b040ba5849b8bc277/fidoketag.pdf
    • https://aawyx.com/sites/default/imageuser/file/mejeruwobodusosanumewozu.pdf
    • http://cokhihoangvinh.com/uploads/userfiles/file/larigabeboponi.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/34049okbhebmfojkhijo5ath3s/9868657265.pdf
    • http://donghocasiochinhhang.net/uploads/userfiles/file/tewenozekemun.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/8cqs5648m39a709l8425d2tqq6/lejufubapomirewiva.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/75f0c273936c8662c6c826a7048ebc08/jimuxejofawivulo.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16082d800d4e86---gesawudapefuvozoguneki.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a188a1a3312---mulenisutozezum.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e7f7eb418---86300373581.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/1a4d87ab8eb108151ac1426728644b5c/36601821210.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/li2lkmcfj9idisr8kmjd4ndt24/wivolaloligusevov.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/c025fe5bdbfdfe53a2a98684df264e56/61680096980.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/c25c25cfbfe0435a2ef09bd7dff0fc4f/97154460868.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec66.bin
50737e73b9a52aeb538e8ac02963c7b7e63fcd78dee82c5e7745588ee64d5131
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC66 16896 bytes
font_01_sfnt_off00011861.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11861 16792 bytes
font_02_sfnt_off00013078.bin
c77f6e13a34670a3037cae3502dafbe60afb29c0c2a86cae5d367546168a500c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13078 11852 bytes