Malicious PDF — malware analysis report

Static analysis result for SHA-256 cefa203823ed1240…

MALICIOUS

PDF

69.7 KB Created: 2021-09-20 14:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 49206a6e820fa71e7a4761b25270b9b3 SHA-1: ec9beccfc9bff54971351b1d46e456c78419d7d1 SHA-256: cefa203823ed1240e8c9e83c459286849333958525ef1111954bbf0d07f0fa25
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to malicious sites for phishing or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://musicfriend.vn/public/default/ckeditor/files/98859442501.pdf In PDF document text
    • http://gabortech.com/admin/file/85520466177.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a4ca58755---fopanidelitikozetiwufo.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/0d9d00cab93ce11e37c7cf00740231d7/didaferu.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/35d241e920e3a55bb4ee74744253f3ad/mozimabifanubiledeju.pdfIn PDF document text
    • http://about-dogs.ru/upload/file/vosuvirifowazosu.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/doguxivalesi.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/peresokupemunow.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/xubesonaporalogefu.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/16878844909.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/933a44d9b5031fc99cabaad2b85a9cc6/98783961338.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/31862266037.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/tobitanobepazatufidej.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/fonegakemogemij.pdfIn PDF document text
    • http://irinabailey.com/upload/files/16988433596.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/97911793332.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/80354853558.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/3144048397.pdfIn PDF document text
    • http://ave-france.com/pics/files/29216691135.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/pupazapadegekefu.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/dixupaxojug.pdfIn PDF document text
    • http://strahyi.ru/images/file/binikikajukajudepupajewi.pdfIn PDF document text
    • https://upaspor.com/resimler/files/waxugo.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9c682af27---81177098165.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=idle+miner+tycoon+hack+androidPDF 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_off0000b31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB31C 10624 bytes
SHA-256: adb021f1e9a983198fb0d80428b6717df925fad594e06eacb147c4a936c66910
font_01_sfnt_off0000cb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB26 14912 bytes
SHA-256: 9d2182d523d44b29cbb82224c585aa6b5bb1c9d319bf025057e160e03bc3606e
font_02_sfnt_off0000f110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF110 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.