Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab6f05c4d33c693…

MALICIOUS

PDF

81.6 KB Created: 2021-09-13 15:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d1a5a96b2f72e04ad4bbb69662f53a2b SHA-1: 705c9b4bb62396fe89340024bd4b2e74afdd9858 SHA-256: 7ab6f05c4d33c693f3c4bcb03d951930ca04857520b022e68a45bff513a937c2
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 or trojan. It contains numerous external URLs, many of which are hosted on disposable domains and appear to form a link farm, a common tactic for distributing malicious content or conducting phishing campaigns. The presence of embedded URLs and the heuristic indicating a link farm strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://huntic.ru/uplcv?utm_term=world+map+with+latitude+and+longitude+and+countries PDF link annotation
    • http://mwcapital.net/ckfinder/userfiles/files/79075586439.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/68225985356.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/32074252114.pdfIn PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/52766501540.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/gefugalejibebemenamaban.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/vixuvakoxolivef.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16130a811a8524---98604706296.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210903_056FFE30C21ED46E.pdfIn PDF document text
    • http://ydchem.cn/filespath/files/20210904213826.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/xonalesufuluxud.pdfIn PDF document text
    • http://scsychem.com/upload/files/65153822218.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/65707287148.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/59895705851.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/tulezakokidap.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/16642697870.pdfIn PDF document text
    • http://serenetour.com/image/upload/File/kimadutabutam.pdfIn PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/nefisileziwofefasusa.pdfIn PDF document text
    • http://4chan.ro/UserFiles/file/48400713262.pdfIn PDF document text
    • http://ephtour.com/FileData/ckfinder/files/20210909_D659760585FB7B66.pdfIn PDF document text
    • http://orthodoxnews.us/file/ralilavalagufipas.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/jufunikolovewujexifaxip.pdfIn PDF document text
    • http://thietbiytedaibao.com/media/files/bosebutarudevevanuwufulo.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/sunutibolufajuweduwox.pdfIn PDF document text
    • https://nls.vn/upload/files/vexuwamivumijumogefap.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_off0000da19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA19 11140 bytes
SHA-256: 768543461171290b49011ad73afca56d68dec64a5bf76909a9e44543f85f6eeb
font_01_sfnt_off0000f3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD1 17252 bytes
SHA-256: cc890045ca79764475ec060ef01b84cbf4c48f11a6f9582957e1b8801c9aa3f6

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