Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdcdda2f8caacdd…

MALICIOUS

PDF

79.1 KB Created: 2021-09-11 04:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c054497c993a192b66ed0c04d21c432b SHA-1: 2c96c9024ccc938b65e09154d00bffee49fd5b72 SHA-256: ebdcdda2f8caacddbddea795b8da41a14e92102c9747ff8fc84d66c6017519dc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to suspicious domains and are structured as link farms, indicating an attempt to redirect users to malicious content. The presence of these URLs and the overall structure suggest a phishing attack designed to lure victims to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://alrukn.co/userfiles/files/tezefuzidorejele.pdf In PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/42608714885.pdfIn PDF document text
    • http://gazduire-domeniu.com/UserFiles/file/93449597025.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613216f604b88---jupoje.pdfIn PDF document text
    • http://pasted-radio.de/web/files/gatisaposedelonakuke.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/26755613582.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/87881180781.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/47540873604.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/jamolotopo.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/76755796034.pdfIn PDF document text
    • https://nadrozmerne-sklo.cz/uploads/78731299859.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/7122372955.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/sujesagezojuxanupafeju.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/43d2368fd48abfe50a52c80964e32e8d/mofasazeviwigazefowuk.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/76168265556.pdfIn PDF document text
    • https://newcar-rental.com/uploads/files/202109100318316805.pdfIn PDF document text
    • http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/xupiralixuwofipa.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/witej.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/66880661483.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/tamivivuti.pdfIn PDF document text
    • http://sd-admin.fazendapenaazul.com/ckeditor/uploads/files/49929346168.pdfIn PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/87292732814.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages/files/vovisepoda.pdfIn PDF document text
    • http://musicfriend.vn/public/default/ckeditor/files/jexupogorav.pdfIn PDF document text
    • https://shopexpert.com/app/webroot/files/userfiles/files/jetorefuruxolel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=chromebook+play+store+supportPDF 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_off0000d12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD12E 10796 bytes
SHA-256: c66ad6f6e980aa6d6bff2a35ac0d76a68a199788b5a169410303006685db5fef
font_01_sfnt_off0000e9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001020d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020D 17400 bytes
SHA-256: 5e4b7b798d5a90cbf8adf488943fcd44326a551130846cad2f5ab740abb04182