Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6cedee6e226a22…

MALICIOUS

PDF

67.7 KB Created: 2021-09-28 03:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7e73496f6f69c5759696ff3402b9242e SHA-1: e89daee4d6ca8137ba35c0cc883d6e98057a68e0 SHA-256: 9c6cedee6e226a22fd6f957c03d1152538ea5fb86bcb3438eb8ce49461d8ffc1
146 Risk Score

Malware Insights

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

The PDF was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a single image and minimal text, with a click-outward action directing to a suspicious URL. The document structure and embedded URLs suggest it is part of a link farm designed to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://irlanc.ru/uplcv?utm_term=super+seducer+2+download+free+android PDF link annotation
    • http://inbiosa.eu/static/cfiles/files/12848770013.pdfIn PDF document text
    • http://kapfenberger-schuetzenverein.at/userfiles/file/80682953015.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/sevogokakebobu.pdfIn PDF document text
    • http://vinaktv.com/storage/ckfinder/files/rewozagoxogugafekazigop.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/39357300225.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/tuxepubezorutajumozub.pdfIn PDF document text
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/69945587802.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/kevafobotegokiwizidumarum.pdfIn PDF document text
    • http://edu-soft.ru/site/htmlimages/file/92554541831.pdfIn PDF document text
    • https://psychotherapie-coeppicus.ch/userfiles/files/jogivufisavi.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/37835362091.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/2725504523.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/b7529f9cd806220eef710e9c45afe639/25417234828.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/2913102240.pdfIn PDF document text
    • http://kasand.com/userfiles/sifomevakirekawinaminorej.pdfIn PDF document text
    • http://toroisg.com/public/images/files/nazetowev.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/matujuzivof.pdfIn PDF document text
    • http://sungder.com/upload/bewisopinowixalokepaj.pdfIn PDF document text
    • http://vedepcuaem.com/luutru/files/lirazudijakikebodida.pdfIn PDF document text
    • http://gonzagafood.com/userfiles/files/84632466273.pdfIn PDF document text
    • http://01host.ru/userfiles/files/zikovulatonalixonidekij.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210905164939.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_off0000ac2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC2C 10896 bytes
SHA-256: cd424fb5685e39fd72bbcd8fa53e196956d072a9feec3a165e69768c39451944
font_01_sfnt_off0000c58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC58F 13748 bytes
SHA-256: 88f1635fad71c0d9bd1ca0bb1c196c4396272b24c601b24dc1119c409945309d
font_02_sfnt_off0000e7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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