Malicious PDF — malware analysis report

Static analysis result for SHA-256 702c050deb23c59c…

MALICIOUS

PDF

90.3 KB Created: 2021-06-27 04:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c017fa993a388d4ab771fe851f047b9 SHA-1: 01800ef2f90344e5c742aef4a1f484210ee51192 SHA-256: 702c050deb23c59c544d6ccaf0de7eaf4dfe1fc44e098d1e26cce63262a34653
156 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. Heuristics indicate it functions as a link farm, pointing to numerous compromised WordPress sites and disposable hosting. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/dljl141hvek287nk6rc3b3fd85/72291418278.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/485fb6a2c3d88090426120ab60fac305/loxiwexefexevimu.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca906ad083---40210268775.pdf
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/46147273073.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792e574200f---jagofotizitasulodevewiwex.pdf
    • http://waelfawzy.com/userfiles/file/juzorowulavib.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/630e2fd7b99805e78963e786e51be6e7/87491664240.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16091d7af0bc6b---46339300757.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/jaa9g6qg7vu0viej1d8fsrhkmi/51430853018.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/6a462825493f2ac8a7b89d934c5ce2ca/49605013694.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5e44b6ddc---37680473202.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-6-13/20210613041643926486.pdf
    • http://asja-doll.ru/userfiles/file/wexalawuraxilibuvob.pdf
    • https://abofahed.com/userfiles/file/74015547521.pdf
    • http://richmediahouse.com/admin/uploads/file/pakorupawofiloxitupeve.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/b0df052d7af6f02acc28328cda6af7a9/wutoxafegilidun.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d211fc00689---kagitodalok.pdf
    • https://aimara-bg.com/userfiles/file/wekonu.pdf
    • http://prodottoitalia.eu/userfiles/files/gobasemavofexov.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/4dce78bb4676e477f281885a74b53bde/forejiwevobimijuve.pdf
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/timawejup.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e835b89e8---71040165393.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/3jnpm952t4mtaonbmi74jmoc26/dadakimib.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/v8ocvt7vurc63a3f5f13t7svo5/175953296.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=signs+and+symptoms+of+burnout
    • 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_off0000fcb1.bin
34b7568d629aebcb7a426bfa4d5cce732c326714b121dc0894d3195cabe5df35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB1 17076 bytes
font_01_sfnt_off000128fd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128FD 16792 bytes
font_02_sfnt_off00014114.bin
4ce5239e27d5c0663d3f2ca2d396acd4bfb6717eb77ae7df9984fc97521d3d40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14114 11092 bytes

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