Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f7184678d7afcd…

MALICIOUS

PDF

84.6 KB Created: 2021-06-29 01:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cf940ccc5e93b111b586f96abc879bf2 SHA-1: 0b32503958a088d575d9ed5afad57feff5ef54d8 SHA-256: e0f7184678d7afcdb937915792f2b6f88658a62a661b6da64e20dff8d5a213dd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs pointing to compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation of PDF vulnerabilities to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 7

  • 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.
  • 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://medvor.ru/uplcv?utm_term=move+money+from+cash+app+to+bank PDF link annotation
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/edd64c7478d2b01c2d1edf5210d7ac5c/16822909162.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/momofe.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-4-30/20210430074820909285.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847049a9588---92959837228.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/gamitipisuzuna.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/bd419dbf92a8995d01358ff9a7b77e48/fajifatugifa.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/5e3qqbe9laqi8hotl550daqkt6/11711157763.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/qpnaa77inlo0p4cn8igda6v66k/80295044975.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090eebf93701---guxutosazo.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/uis3nop1v556dgkoh1jveb1duq/76254897019.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/f6k9sol9m39d0ijp318hrabcb1/saworinurujexobunajiwanad.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///75473305837.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/lomisumesapaz.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/lotafixukag.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/4c55fd5a14af64481dc492ce1ad04c87/67715231625.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/68460198063.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/repuzolewore.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/e04860482008823fa3604853ff648ef8/59483379344.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098300a5130f---94973095235.pdfIn PDF document text
    • https://inverpalmas.site/aym_image/files/74311946306.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160896190b4eff---xulaxegupuge.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210623114339146.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607426f414282---fakasuzakipixil.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/27e9cddf4a5f1cf9322e457ae7f2ba2c/merewuguvebaxu.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/fefubejamot.pdfIn PDF document text
    • https://avenue102.com/uploads/file/xazapunazutagat.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_off0000e7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10007 16768 bytes
SHA-256: b7294ea5b6715b398592a7dda672c65db1f7a696cb71dc8e748f38e8cb4d772c
font_02_sfnt_off00012b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B91 11012 bytes
SHA-256: f6c9c77da663497331e6d93e804ccfc02a6a1d60ecd501cc34efdc3479a80515