Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d59b43f3cf8ae4…

MALICIOUS

PDF

85.3 KB Created: 2021-09-23 12:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 34b9e5f8d00b595ee96608bb93c6df46 SHA-1: 6153322c3e049b5dea12a012f66fed1f00cc6aa3 SHA-256: d2d59b43f3cf8ae44336740271a1459943199e827ccaaa1dd38c2ce76228c292
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 are part of a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The presence of JavaScript, though obfuscated, indicates potential for further malicious actions like downloading second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://cructi.ru/uplcv?utm_term=legit+robux+generator+no+human+verification PDF link annotation
    • http://qualityfirstservices.pro/testingsites/advantage_aviation/assets/media/file/jusafolamawilifuz.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/vegotozaxepopod.pdfIn PDF document text
    • http://ramenhajimetustin.com/uploads/files/badimofoz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145d2121ea98---20283713336.pdfIn PDF document text
    • http://anpharma.net/upload/files/56215163734.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/15074785894.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/files/31819287981.pdfIn PDF document text
    • http://oecschool.com/userfiles/file/xaxelesuraf.pdfIn PDF document text
    • https://stvorki.ru/files/file/sixarugamuvudij.pdfIn PDF document text
    • https://akconta.com/uploads/files/66325943970.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/fanujunubowelonetu.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20210905065004.pdfIn PDF document text
    • http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/nigujademubaxuv.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323d49e87a2---xemopalovumumebovafivefe.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/disuzageseg.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/7520943681.pdfIn PDF document text
    • http://bbbo.handyfriendship.com/upload/files/jifodinugutoperisa.pdfIn PDF document text
    • https://www.sudoku-cool.com/ckfinder/userfiles/files/10263150152.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/49738609024.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/38773960526.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/bosuxikurorapamuke.pdfIn PDF document text
    • http://www.de.ruben.pl/ckfinder/userfiles/files/zaruretevutuxezolaxokagot.pdfIn PDF document text
    • http://techmechengineers.com/uploads/pevobusekawuporadux.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_off0000e677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE677 18388 bytes
SHA-256: 670cd99e58160c9774480d956814212b8cc5d861dc2c5791abe90a5e23d52b36
font_01_sfnt_off0001165a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E71 10932 bytes
SHA-256: bf661014848923a7608ce33024842ffabc3a8b85bbc0a84dee90810e210a7ed2

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