Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7cac6e03eaa20fb…

MALICIOUS

PDF

81.2 KB Created: 2021-03-17 19:14:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93e1e395fac6e862722f6ea192d26044 SHA-1: 2d038fa3307652756681f5d30b47158af0e7173a SHA-256: e7cac6e03eaa20fb594cb476f774f2d50846248af8ac6011336d1762bd7703af
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many of which point to disposable hosting or suspicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure, likely intended to lead users to download further malicious content or submit credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=customer+profile+template+google+docs
    • http://garderob-podolsk.ru/kotabulogixiruriledo46vki.pdf
    • http://visunuduxat.mypressonline.com/96356130642.pdf
    • http://nitiwopororotef.mypressonline.com/journal_questions_for_high_school_students.pdf
    • http://kulofokugizadeb.22web.org/greenworks_2000_psi_pressure_washer_stopped_working.pdf
    • https://static.s123-cdn-static.com/uploads/4420248/normal_5fce256de7c38.pdf
    • https://cdn-cms.f-static.net/uploads/4404757/normal_600b656995d88.pdf
    • http://zopokujejisolan.getenjoyment.net/list_of_core_values_for_companies.pdf
    • http://maxobujixeweden.sportsontheweb.net/us_history_timeline_1600s.pdf
    • http://babitilakibo.mywebcommunity.org/bulova_marine_star_chronograph_mens_watch.pdf
    • https://static.s123-cdn-static.com/uploads/4461773/normal_5ff6ab67dc549.pdf
    • http://elerctum.org/koan_sound_vinyl0kigi.pdf
    • http://thecet.xyz/17625911957yt1qb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_d14ac9a6c89143dd9348233634f81a23.pdf?index=true
    • http://fazozogujezeto.rf.gd/centos_7_ifconfig.pdf
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_d25d6a37348744dab9e683162cd0353e.pdf?index=true
    • http://senovavokugured.rf.gd/topizokolidujekufem.pdf
    • http://zinuruxe.epizy.com/42518706162.pdf
    • http://rodedewezijore.atwebpages.com/ashrae_standard_62_1989.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_off0000f71b.bin
5ef4481f8d9b8f711eacf51f68280264da4eef38505ec4bc5649ebee4f0e2b8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF71B 5380 bytes
font_01_sfnt_off00010948.bin
15964df870894b3dfe2d7bcfb8f33c74bf4457e14291e1e2b094de10ff1bcf0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10948 13856 bytes

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