Malicious PDF — malware analysis report

Static analysis result for SHA-256 76c53a1023abb965…

MALICIOUS

PDF

74.0 KB Created: 2021-04-03 23:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7b2081ffdcc53c1c6f7960358d2f3b8 SHA-1: ba894ca1f8e2b347200bb6d695eab4e0f7d06f27 SHA-256: 76c53a1023abb96534d4e00c34f089ff83bc6e7be4e4677acd22cf494ec49d27
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The file contains a large number of external links, suggesting it is part of a link farm or intended to host phishing content. One of the extracted URLs, 'https://lozipotod.ru/aws?utm_term=how+to+remove+whirlpool+stove+knobs', is likely a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=how+to+remove+whirlpool+stove+knobs
    • https://cdn.sqhk.co/zimopaji/2hijchg/double_masters_draft_pack_walmart.pdf
    • https://cdn-cms.f-static.net/uploads/4475866/normal_601daf962e570.pdf
    • https://cdn.sqhk.co/javukapegami/jUge8Td/sniper_elite_5_pc_requisitos.pdf
    • https://telewapoki.weebly.com/uploads/1/3/4/8/134897398/5031113.pdf
    • https://cdn.sqhk.co/waxigapo/jihhha6/62534583175.pdf
    • https://static.s123-cdn-static.com/uploads/4380545/normal_5fceaf66837c4.pdf
    • https://bixikobitil.weebly.com/uploads/1/3/4/5/134525497/80e39c4b733df.pdf
    • https://cdn.sqhk.co/bebumila/rh9jbhb/40113282871.pdf
    • https://xepezexitig.weebly.com/uploads/1/3/0/9/130969834/d894da07f.pdf
    • https://cdn.sqhk.co/guvevifowo/PKQhchh/lube_oil_monitoring_system.pdf
    • https://cdn.sqhk.co/ronuwimo/9iciihd/retasu.pdf
    • https://cdn.sqhk.co/rezejigobip/Bghjihh/hearts_of_darkness_apocalypse_now_documentary.pdf
    • https://cdn.sqhk.co/tosobulig/idjiVji/mixonuzoxakofiti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bb6615ab-b59b-4908-bbf9-e603dd7d9446/another_way_to_say_great_place_to_work.pdf
    • https://s3.amazonaws.com/murudute/kelechi_africana_love_me_audio.pdf
    • https://uploads.strikinglycdn.com/files/b14f1d92-8bcc-4370-b2d1-c9c386b71aae/how_much_does_it_cost_to_repair_screen_at_apple.pdf
    • https://uploads.strikinglycdn.com/files/dbf0e3d1-4b33-425c-877e-e91865166dd8/20524409102.pdf
    • https://uploads.strikinglycdn.com/files/542438f5-a9a9-4e90-a734-aa6262e37401/system_safety_engineering_certification.pdf
    • https://s3.amazonaws.com/lakujusitejojet/teenage_romantic_books.pdf
    • https://uploads.strikinglycdn.com/files/b7efc5b5-a5d9-4db4-9fee-f701b1dbd6dd/juvinalenib.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4e2.bin
ccd29a90cb3677c2eadbef4359dcff85ef245fa6596174922da11c821ddf8e54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E2 5168 bytes
font_01_sfnt_off0000f658.bin
b6c9181160d442b976eabcb74a6ccf787cdbb12a9ea59975417419da8935cba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF658 10676 bytes

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