Malicious PDF — malware analysis report

Static analysis result for SHA-256 705dbaf294596eb0…

MALICIOUS

PDF

79.5 KB Created: 2021-09-21 01:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 147664f54c563bda1aae32edd9815a42 SHA-1: 86317db7531b474e76d8a1fe04398b318b7ccd4b SHA-256: 705dbaf294596eb08a5d1e9c24b59c8e9c60399aec6ed7cd04872ddf14f1fd02
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm on disposable hosting, indicating a likely phishing or malware distribution attempt. The presence of embedded URLs suggests the PDF is intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://queure.ru/uplcv?utm_term=minecraft+for+dummies+pdf+download PDF link annotation
    • http://highdeal.linkeo.net/ckfinder/userfiles/files/debanuvopufudusagop.pdfIn PDF document text
    • http://ibnuaffan.com/ckfinder/userfiles/files/ruvofux.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/lupojofokuko.pdfIn PDF document text
    • https://amzentransportationindustries.com/admin/imagetemp1/file/93919519682.pdfIn PDF document text
    • http://akatumusics-ang.communication-pro.fr/public/1283/contenu/file/73244899197.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/riramobus.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/gawafekifoz.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/rubiwagelulodurujobif.pdfIn PDF document text
    • http://iranjobex.com/cache/fck_files/file/73462085677.pdfIn PDF document text
    • https://mailing.crpm.ch/ck/ckfinder/userfiles/files/jewogumojulamosunexew.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/8657716053.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/1855686609.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/janenotop.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff50de310b---suxagiwusose.pdfIn PDF document text
    • https://angem.fr/userfiles/file/3610827444.pdfIn PDF document text
    • https://micro-logic.ro/images/uploaded/file/87494967107.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/18418811772.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/30290952746.pdfIn PDF document text
    • https://nasco-ye.com/uploads/file/21927426355.pdfIn PDF document text
    • http://alocainghien.com/uploads/userfiles/file/remidetadomosi.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/tdegfc27abmti2sp9j9un9n050/sedosuxuzojololepefi.pdfIn PDF document text
    • http://njchemland.com/upload/files/zadulasafawu.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/83379142192.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/felokagopafivesop.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021091207043270554.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_off0000d165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD165 17532 bytes
SHA-256: 7ef526b9fb02ab517e09743a88e6cb8312e836cef027a95c1c7d886fbb72e689
font_01_sfnt_off0000fe72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11689 10960 bytes
SHA-256: 0cb5b76189bdaaf7e8c3ad67b5bc1dbf01994eef23f2e9bf44dcd95bf2a14963