Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff1f8240c2b3d4b…

MALICIOUS

PDF

88.4 KB Created: 2021-06-26 14:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 42af17a949bcbfe30ef0f8fe16ab412a SHA-1: 0180e05e59056e2514d238698388c72310626c1f SHA-256: 1ff1f8240c2b3d4bd16bf4780f72f8f0f5276e7ca003853fcc418c8bd013a4d4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or scam attempt. It contains numerous links, many pointing to compromised WordPress upload directories, designed to redirect users to potentially malicious content. The presence of a 'coin master free generator' URL suggests a lure for in-game currency scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606d93b3cf52f---jidodut.pdf
    • http://bjsprt.com/uploadfile/file///2021061701534913.pdf
    • http://ddrwc.net/clients/869849/File/woposuxurolowafimi.pdf
    • http://meble-tk.pl/userfiles/file/19650217750.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af2837b7e65---lebirabifurorefodobejojeb.pdf
    • http://sosnovgeo.ru/userfiles/file/72223562271.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9531b4ea3---xomudu.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f6ba72a40---95440649209.pdf
    • http://starwindows.ie/ckfinder/userfiles/files/gifetifazag.pdf
    • https://akapacha.com/userfiles/file/17400898800.pdf
    • http://bycongroup.com/UserFiles/file/63823403087.pdf
    • http://laclonghotel.vn/upload/files/60327498376.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/5bc43c3c8b707ffff48364ee448f10db/44930099606.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/ed4f878550bebb6036753aeed442d890/76334159239.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826f3d65110---nojapegetekemezutuzufab.pdf
    • http://ikkosushi.com/uploads/files/58097083535.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/d313f16322f0c14c3cf4e35baf61a0e9/vumemumusuxazufafo.pdf
    • http://bridgestone-ice-cruiser-7000.ru/ckfinder/userfiles/files/mozelatitane.pdf
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/91424687176.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5a71ac67f---lufugakosafovezup.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a3df903f8---wefuvekuwelenuneb.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/f997f92a1807c93300384d4e313e0d53/59102906685.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/bbjiamnd6b96tk6tru4u7o63er/bakujoxosenajiz.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=coin+master+free+generator
    • 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_off0000f601.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF601 16792 bytes
font_01_sfnt_off00010e18.bin
96ee71481ab526e8b10cd6c02a9396d3a9f744e35f7d577f468600c56c0441a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E18 10544 bytes
font_02_sfnt_off00012624.bin
8aec99f8a5e98217df858ad2ec8668e45a3102fe5fde6773aa79abf6892624fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x12624 17732 bytes