Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62e2a171763ef25…

MALICIOUS

PDF

81.7 KB Created: 2021-09-23 19:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c111b34d4207cec32ced236a748bb282 SHA-1: 33086b31bd9e9f499c9328e8a510110cf217c394 SHA-256: f62e2a171763ef25fcaacbd1b3db8c33e63dccaaf45b58b920b837f5ef61df5c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Numerous external URIs were extracted, many pointing to disposable hosting and functioning as a link farm, indicating a likely phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious sites.

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://laborke.ru/uplcv?utm_term=cheat+engine+android+alternative PDF link annotation
    • http://pscemetery.com/userfiles/file/zivufevogovodokaxibobewe.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/xivenum.pdfIn PDF document text
    • https://rakowka.pl/userfiles/file/23401191165.pdfIn PDF document text
    • http://robedecreateur.com/img/files/33357657444.pdfIn PDF document text
    • https://inprovitcentroamerica.com/ckfinder/userfiles/files/bonaruwowulelakojozodanel.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/kezugekewo.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/9q94es5qt13s3tps6b0ropmnv6/xabodazowopolezajugevixa.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137fab52e950---99372435026.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/buvorogesogo.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/6092147165.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/juzofusijirene.pdfIn PDF document text
    • http://jn-zhsc.com/upload/21684284973.pdfIn PDF document text
    • http://abnig.friendship-match.com/upload/files/nabojunifozawiwojafa.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/tudavapuvetepumobejobe.pdfIn PDF document text
    • http://linkipt.com/_UploadEditor/files/29999672779.pdfIn PDF document text
    • https://miet.hu/kepek/93600676214.pdfIn PDF document text
    • http://tokyo-sanritsu.com/userfiles/file/98634204662.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/97413296440.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/11305973083.pdfIn PDF document text
    • http://hockjoohin.com/admin/uploads/file/tumezad.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/peretokejagalej.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/41989095825.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/bijovuwodizobovukuma.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/53266202964.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/bipolofokedubate.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_off0000daa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA8 18088 bytes
SHA-256: b308c0b96dfa86509ac33b60ab51aeb156d3cc16a99c5020ccb933800fce9906
font_01_sfnt_off000109bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D3 10456 bytes
SHA-256: 21d435b537997bdff08489e7b317cd6071e7cdb42ad8b7b834d4148933f3b20c