Malicious PDF — malware analysis report

Static analysis result for SHA-256 1952dc71186fd1ba…

MALICIOUS

PDF

90.3 KB Created: 2021-04-01 06:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46b1619941660f4e6f01ceb2e12a4d55 SHA-1: e1fe705cf62d4334aed1a64a2878d5c95e208934 SHA-256: 1952dc71186fd1ba544b1d64d011ac9013e37cb2f1f7db7fa0b142ac05f0f797
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external links, and the embedded URL 'https://pelibifir.ru/award?keyword=azure+cli+commands+pdf' suggests a lure related to technical documentation. While no scripts were explicitly extracted, the nature of the links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest malicious intent, likely leading to a phishing page or a further payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/award?keyword=azure+cli+commands+pdf
    • https://vipozuguru.weebly.com/uploads/1/3/1/4/131483083/2178171.pdf
    • http://zabopibisoxe.22web.org/50830118586.pdf
    • https://fosevikotik.weebly.com/uploads/1/3/1/6/131637163/549c88c0962cb8.pdf
    • http://bobatorosas.mypressonline.com/punaloxesem.pdf
    • http://wemuwetafivaxe.sportsontheweb.net/edit_file_online_and_save.pdf
    • http://pubofumoxo.scienceontheweb.net/avivamento_pais_de_gales.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nafoxuda/aged_care_guide_wa.pdf
    • https://s3.amazonaws.com/nimuwet/24068671336.pdf
    • https://s3.amazonaws.com/dezajok/9338797776.pdf
    • https://s3.amazonaws.com/xuzed/posi_joists_prices.pdf
    • http://dusiwesidixe.epizy.com/fusexozoda.pdf
    • https://uploads.strikinglycdn.com/files/4f4334d3-3708-4cf7-b6c3-fc50d360f8a3/39620673546.pdf
    • https://uploads.strikinglycdn.com/files/118010fa-de5a-48d1-ad0a-4e7785c040d3/76600731083.pdf
    • https://s3.amazonaws.com/varolexexus/divine_ire_build_guide.pdf
    • https://s3.amazonaws.com/fotepopunaj/automatic_clicker_for_android_marshmallow.pdf
    • http://tipokeviti.atwebpages.com/45971121489.pdf
    • https://s3.amazonaws.com/gisujubolidine/the_expert_at_the_card_table.pdf
    • https://uploads.strikinglycdn.com/files/78bf5cb5-1e99-4487-92d1-b949e81900fb/60630277518.pdf
    • https://uploads.strikinglycdn.com/files/81495081-fe28-426f-b2bf-190241db8794/59372720000.pdf
    • https://graph.microsoft.com
    • 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_off00011fee.bin
65683a657f3732f26de3b8d61268ee273571e8fd046d026f036c1adce50e9020		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEE 5340 bytes
font_01_sfnt_off0001320a.bin
4f5d041492f18b88b19b9761e621967e0ee9e737e06089ccf70d1b804baba870		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1320A 12376 bytes

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