Malicious PDF — malware analysis report

Static analysis result for SHA-256 72673a6ed3262cf6…

MALICIOUS

PDF

84.9 KB Created: 2021-09-18 11:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bcc2179450a7f771f6e0fdead5b10aa8 SHA-1: 99cf614753546e6658a7cc5b075f07473c994bac SHA-256: 72673a6ed3262cf6521b2d5c261763a99e93e37c114381087dbcf2b95ea5e088
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm directing users to various websites, including those hosted on compromised WordPress installations. The presence of numerous external URIs and the nature of the links suggest an attempt to lure users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://philabc.ru/uplcv?utm_term=gta+sa+lite+mod+apk+data PDF link annotation
    • http://www.klimavill.com/data/editorfile/96125382114.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/jurowo.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613284866a920---lisirelazenetonil.pdfIn PDF document text
    • http://otestmanager.com/club/data/userfiles/file/20210912154954.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/00d61307eccbe18325a5aba9159023ea/lokelusanabolunuxono.pdfIn PDF document text
    • http://syekp.gr/sites/default/files/file/kusos.pdfIn PDF document text
    • http://happyorderfood.com/uploads/files/zedezixanewe.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/97216202040.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/18915069486.pdfIn PDF document text
    • http://askort.pl/Upload/file/50441059988.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/81724592701.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/70882489389.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161340b988a926---91841266623.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/vefuzewawudafejabigasu.pdfIn PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/44144546527.pdfIn PDF document text
    • http://matras-devison.ru/upload/file/93228097193.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/83587133265.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/en6fv6v7f3cbj91289ag8i1u03/76140387236.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/e68l9bbfh0o2075c35402i8sf7/7160747484.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/24820358409.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/3601236782.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161421a38535f2---52605908886.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/88872274686.pdfIn PDF document text
    • 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_off0000ea58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA58 16732 bytes
SHA-256: d7761a4f083e46018234ffc80744e6e3ac243bfe9503dcc7362cd2a3f7f9cba0
font_01_sfnt_off000115de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DE 10480 bytes
SHA-256: 7a81983503ed5b884e84398a0fbcf58660df4ade1cb0d3004a0892351d258c1e
font_02_sfnt_off00012dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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