Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c06b9c2f021404a…

MALICIOUS

PDF

86.8 KB Created: 2021-09-19 06:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 46c0e3dbae2081695e737ee510a442e4 SHA-1: 97e52123ae50f2026162433b180ab2db062eee25 SHA-256: 2c06b9c2f021404a04cb0c123328b2a8e93c020b82e6c73a53dc3a2d4c4fa914
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 disposable hosting and are likely used to redirect users to malicious sites. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://coretry.ru/uplcv?utm_term=es+file+explorer+android+tv+apk PDF link annotation
    • http://a899.net/userfiles/file/56473540194.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9b34715ca---pafolaligazilozikapik.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/57534688260.pdfIn PDF document text
    • https://brod-plovdiv.com/images/rifaloxa.pdfIn PDF document text
    • https://abyway.lv/images/ck_images/files/30576769836.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/39183549322.pdfIn PDF document text
    • http://architettipassarinmarzotto.com/userfiles/files/disibaluwukogamozuli.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210912_1DE0ED946BEB785B.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/soresewutepaweturu.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/userfiles/fichiers/77665458679.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/673ca24af8767623473def6559c10e6c/66545279351.pdfIn PDF document text
    • http://study4student.com/cache/fck_files/file/teromajoj.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/dozufarogip.pdfIn PDF document text
    • https://lazerom.pro/media/file/wurawupaferixejom.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/79803774473.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/kizokakowizal.pdfIn PDF document text
    • http://vektorma.ru/uploads/assets/file/gujederupage.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/jetesusisojabu.pdfIn PDF document text
    • http://fjsxsx558.com/upload/files/55590612685.pdfIn PDF document text
    • https://atlantidegattico.it/file/67639086465.pdfIn PDF document text
    • http://pegasomeeting.medcoast.net/ckfinder/userfiles/files/36738192583.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/67368292883.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/kizavokawe.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_off0000edfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10614 10736 bytes
SHA-256: 267d260b4f3c4f08ded579302b0b4b326f06a4a24d6f17199ecacc51f773b869
font_02_sfnt_off00011ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE3 17964 bytes
SHA-256: 5d884e03f871050e2126d72c34cc8f53296f2335ed4b42b865e2b8858c79d144

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