Malicious PDF — malware analysis report

Static analysis result for SHA-256 34cc69a3264e131a…

MALICIOUS

PDF

122.4 KB Created: 2021-07-28 12:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 38d387dff32b05456150b1865115ab21 SHA-1: 04987a4833d2416b674ede19146aa6fb2f281a92 SHA-256: 34cc69a3264e131a9e193b1b58dd4f0a13f73a4be15dae43b1cf14fddf5fc216
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple disposable hosting sites, likely intended to trick users into downloading a secondary payload. The presence of a 'download button' lure further supports this phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://theelementrama9.com/userfiles/files/9648788872.pdf In PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608370217d39c---62073231580.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/87710734813.pdfIn PDF document text
    • http://esistore.de/userfiles/file/76058505711.pdfIn PDF document text
    • http://beytarimcilik.com/admin/editor_resim/file/pejowerovodibololimonuvod.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609858878466a---jizova.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871aaa6b6ff---lekojajepakepabenabaxezed.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/2620v2e7ot6g2bhrsevcdu38s4/34762262815.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607618922f1b8---11945696478.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2b79be383---22071162071.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/666bb66aa02f6ebbd873b77ec6ec176e/zoronozo.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/lobebajasimidanojaxub.pdfIn PDF document text
    • http://magicfood-cn.com/files/20210628155245.pdfIn PDF document text
    • https://blugarden.eu/file/popifizazomazemuzusomig.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160722b71254f2---44422487496.pdfIn PDF document text
    • http://kisito.com/userfiles/file/dosidilapejavuk.pdfIn PDF document text
    • https://kurashi-kyoiku.com/cms/dat/upimg/file/sevutaxufegi.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210517181405.pdfIn PDF document text
    • http://nprofit.hk/userfiles/11604416387.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user///file/_0359716001624367810.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/gifuweditugarixalob.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7decf1bfbb---momijobunako.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/nanalasulepevavuzuvip.pdfIn PDF document text
    • http://gyorszol.hu/userfiles/file/zimagudo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=baixar+kawaks+arcade+emulator+apkPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC9 16084 bytes
SHA-256: c27fafdda185be2695e99106f22849c7304d1d4eff2202c3575f3979fbde09eb
font_01_sfnt_off0000f4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D10 20932 bytes
SHA-256: ce47c9e1e993e6c59c937876109733b812538e729f86b360f4eec42255a59f14
font_03_sfnt_off00014108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14108 48240 bytes
SHA-256: 3b5dab434f3291b53f91fb0248d8e608370cbab13fff473ba3fd15069098718d
font_04_sfnt_off0001c064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C064 11004 bytes
SHA-256: cb77b3bc2e30948cd1f329d71cd985607aa7d709f3df1b07a63f5eec442677ce

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