Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fb777cf89566a4f…

MALICIOUS

PDF

75.0 KB Created: 2021-09-03 09:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2146e7a37fdad965581deea86558e38c SHA-1: 6897d931973c5f6fa51b04bee78a6cc0e0f6d20e SHA-256: 2fb777cf89566a4f28efa98cffc292a4756d28738776b8967998fc42d79df52f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing or malware distribution lure, as indicated by the high number of external links, many pointing to compromised WordPress sites. The embedded JavaScript stream, coupled with the ClamAV detection of 'Pdf.Phishing.Trojan', strongly suggests malicious intent. The primary goal appears to be redirecting users to potentially malicious content or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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://smidgel.ru/uplcv?utm_term=buku+pengantar+ulumul+quran+pdf PDF link annotation
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160790cb6cd94f---titanejulajuvufolapawe.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/jasidar.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f14cb3c6ffc---movezejaseti.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/84654938548.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f588f83846---42750998860.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f777c9c231---17032763447.pdfIn PDF document text
    • http://sun-eko.eu/files/file/bafagopalitudobezi.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/203f87e15d687833b430f74e83123b60/jawemijifabibozor.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/zubobagixigopa.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074579316223---tedalofewetageko.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/70129312893.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/vojejotiguxiboxotede.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878cc23af48---8122793026.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/bupibuwezagagenolarugam.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad903b53fe2---2440775727.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/r678ra3hefqukseunpdnc2jmfl/3602711131.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/sisabob.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/907378ded96ce01ea5573d7e14ca5dad/takadafiv.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/269d4a37bef7dbff18b592064361a1dd/judipozomijifatog.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/abc2df07b7cfb65e966fb4e05fe9809a/87507173688.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830984eb74d---64222009645.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/xavigagotimukixexudos.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fukawofunepuda.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/1336ac386796475c9f2b0698b19e8061/tokokomipivesarilikofam.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/muvaguvigufutagutudi.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_off0000bff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD809 10852 bytes
SHA-256: a85285a276e11a83b5f032b889e99bd4b36e17850b276de3a31e3b87e78c35fc
font_02_sfnt_off0000f095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF095 17320 bytes
SHA-256: 2fe423c0ab9b4ecd9b9789de478581dc8b6ef5b2f50ebe4901e03d3a839bdd15

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