Malicious PDF — malware analysis report

Static analysis result for SHA-256 46676b8929e9d5dd…

MALICIOUS

PDF

77.6 KB Created: 2021-09-15 10:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e7f9a6486635ba2701d68c42a1cdcd5f SHA-1: 03baaa130916f297f5678265d9dc9c33e360f1b1 SHA-256: 46676b8929e9d5ddcaa754e95900d2526e90a0e9c23e1687da561075326406f8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs, suggesting it functions as a link farm or redirector to potentially malicious sites. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution campaign.

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://dagvandearchitectuur.be/_files/file/sixerewebojubazuxaxajinot.pdf In PDF document text
    • http://khachsanmyngoc.com/upload/files/4806484805.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/fuwiw.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/pumanofomefoka.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/41114656642.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109080108048677.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/rovefafokimizipawerim.pdfIn PDF document text
    • https://successstudio.net/userfiles/file/xomigotifajozilusanewusof.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/jofifojokogisox.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/38152887248.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/livumexumatox.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161332c1f8ccb5---letesoxikazotu.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/10744327511.pdfIn PDF document text
    • http://minhtoangalaxyhotel.vn/app/webroot/files/ckfinder/files/ziwunizijaxoxa.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/83697176070.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210907225138.pdfIn PDF document text
    • https://mastirz.com/userfiles/files/woparozasofuketozeze.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/gigorujakijiga.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/larodojuzarotalos.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/1a0bca2cdfb379b1830c5e38d555f9a4/13652801844.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/jilakubirepigajudomoti.pdfIn PDF document text
    • https://hgb.se/filer/file/suwopikajemidajugodelanim.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/zulakuzupiribado.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=pokemon+pearl+version+downloadPDF link annotation
    • 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_off0000c99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99E 18120 bytes
SHA-256: e47bef2097503db00f52c57177557700c3a7b79311214c3a289dbb4d634c449e
font_01_sfnt_off0000f82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11044 10700 bytes
SHA-256: ec1a95941346362ded0793f231aa0fcf7c24e0d51b6214c564770a6032bd6159

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