Malicious PDF — malware analysis report

Static analysis result for SHA-256 79e9a65d70885e87…

MALICIOUS

PDF

73.6 KB Created: 2021-03-01 06:02:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 23cdc7a61aac3141060a8422c90f55b2 SHA-1: 3bf0a199c0319be198179f60f9c22b50dc14f2c5 SHA-256: 79e9a65d70885e87ecae5bb098301be41008ec6c63112946db959b90866d8ed1
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The heuristic 'SE_INVOICE_LURE' indicates the document attempts to impersonate an invoice or payment request to trick users into clicking the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://lozipotod.ru/wix?keyword=ap+registration+deadline+2020 PDF link annotation
    • https://migawonakizize.weebly.com/uploads/1/3/1/6/131637147/guliju_sepovamafotese_nujadujebej_karasa.pdfIn PDF document text
    • https://baduzasozem.weebly.com/uploads/1/3/1/4/131407439/4074478.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/fjgU8WR/free_online_games_to_play_now_fortnite.pdfIn PDF document text
    • https://fumevido.weebly.com/uploads/1/3/0/8/130874276/goviwufubukud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505159/normal_60254c3c8abf6.pdfIn PDF document text
    • https://cdn.sqhk.co/womilepeba/ME4iggh/knight_archery_maine.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/kotijaretovuvo.pdfIn PDF document text
    • https://ferateritilew.weebly.com/uploads/1/3/4/2/134265971/wasuzovajesom_dobimosogof.pdfIn PDF document text
    • https://sozatoma.weebly.com/uploads/1/3/4/4/134484551/kobometodam.pdfIn PDF document text
    • https://kafowuvipuv.weebly.com/uploads/1/3/4/3/134337110/pawuwoxu.pdfIn PDF document text
    • https://katalulipof.weebly.com/uploads/1/3/2/7/132710678/9929c.pdfIn PDF document text
    • https://valetakomo.weebly.com/uploads/1/3/4/0/134012509/tuxixofo_lajabanadud_kusene_xegokademisi.pdfIn PDF document text
    • https://user.totaIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/rigejibikot.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/81580770092.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/how_to_set_up_hotspot_on_verizon_iphone_xr.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE294 5388 bytes
SHA-256: 2449cc9b724817672e37ad18b3be1ab927e67e04d56dd91327bf01b9d71228b8
font_01_sfnt_off0000f4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FB 10852 bytes
SHA-256: 5ae3a9fb476d6c36b122a69d1e20e27016f3b6e53d2ee5b28b0b38927d8361cd

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