Malicious PDF — malware analysis report

Static analysis result for SHA-256 11227194c289cb0a…

MALICIOUS

PDF

79.2 KB Created: 2021-09-07 05:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 34d246cf33f82354641c342cf5180aa6 SHA-1: 32d724204901301c8b8cfa5ff6741cd066962092 SHA-256: 11227194c289cb0aa59df98e10dd6318fd5c2da4d4661404d8b6191fb7a8e68d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://mimpiindah2.com/contents//files/rikelasovexuzapavabezimu.pdf In PDF document text
    • http://paliukenas.lt/i/File/45897483218.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf9d3871d4---xagiji.pdfIn PDF document text
    • http://yildizteknikelektrik.net/resimler/files/wesomorazikopa.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/togufeziv.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/kujimiraj.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16096cc901296a---59280879470.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/vaked.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/7415973e9b379c7f5f68a32bcb14acf0/kufex.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-7/file/27497298333.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/a0acc07a87285deb07151496bc5d04fd/84766445171.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/32394130774.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/dutewifixalaxig.pdfIn PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/93253147986.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b53f5b56784---pezuworosatelot.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9ebfeb3cf---81082657539.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/5fac18dfc1b07580056ef95a3eeb043d/xokepasifo.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607408c3e04d8---96784941565.pdfIn PDF document text
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/3178c15c0439e841968722060dbd3e26/34510271394.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/06/files/210622194721.pdfIn PDF document text
    • http://teplospectr.ru/images/files/jezer.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/82712890987.pdfIn PDF document text
    • http://praguetransfer.com/files/file/30667794002.pdfIn PDF document text
    • https://upbfassadenbau.com/upload/file/63616953446.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=domaine+de+d%C3%A9finition+d%27une+fonction+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FE 21224 bytes
SHA-256: 716c40aab3d21467034a77374dbabfacb3b6fe7b380c5a26060af93ea884cb93
font_01_sfnt_off0000fc64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001147b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147B 10756 bytes
SHA-256: 004d34a7e8679dcb27c628d60a55e8752ee0c1cd9a5c0259064eb4919e5dbf9c