Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c4c238798f4adca…

MALICIOUS

PDF

99.5 KB Created: 2021-07-26 14:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c4abe53af3fd91bd97db25707162a1bc SHA-1: c0b9aaf4d0696ceedd75b663884120afd306f691 SHA-256: 2c4c238798f4adca7d6c6104a4863b6bcca8fd1b80f0e91a63853610beb38beb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • 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.
  • 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://fotobolfestmeny.hu/mvc/userfiles/file/ledugekokiropozumese.pdf In PDF document text
    • https://brigitte-farner.ch/userfiles/files/30072559332.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/e7f1e2389525b1ee67ed2c2a93fd80f2/62570658986.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607260a7aaf04---80587757943.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/zekizuvedapo.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d01cb023676---14708640717.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080b5e83eca8---72924342190.pdfIn PDF document text
    • http://allycatering.com/userfiles/wobirarekejiz.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/33591887587.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/zefilojovejudas.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd30f52d56---kuvexiz.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0937de3822---xajuru.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/solax.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16093fc5ebfba6---14300241425.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/4a85c665199ed5aedd9b1ec8a6ef1c3d/fuwar.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/15300037755.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/41918170147.pdfIn PDF document text
    • https://dadrarad.ro/userfiles/file/31635208981.pdfIn PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/govaboxazib.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/46117415373.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/51351696670.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/bagotur.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/5658642264.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c851599dce3---28004370013.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/madotododaza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=what+are+the+side+effects+of+covid+19+vaccine+lastPDF 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_off0001204b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001385d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1385D 16900 bytes
SHA-256: 294c2d42354479fca212dcc3a9046e1304da1583e863cf3b70bdf5fe31538446
font_02_sfnt_off000164a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164A2 10852 bytes
SHA-256: 2daa41ac079e169ba766ced7ac7a47c78b23a85a9cf059f02ae3cbd34ccde89c

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