Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5174a0798ee431b…

MALICIOUS

PDF

73.7 KB Created: 2021-03-22 07:30:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: db27fdc4b2596fc6e6f99a2cb89cef8e SHA-1: cf1d0041f126ebe74f3fce2a81f35200f846b402 SHA-256: c5174a0798ee431b104c71d8f484ce9e44813c81b4ed3f674f088ecc58e67b28
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs pointing to external websites, indicating a likely attempt to redirect users to malicious content or phishing pages. The presence of these links suggests a phishing or malware distribution campaign, potentially initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=quote+from+life+of+pi+about+religion PDF link annotation
    • https://cdn.sqhk.co/kidirugolo/cqQiezT/judogagoruged.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451019/normal_602b9804a5ae6.pdfIn PDF document text
    • http://wugumonisukanib.sportsontheweb.net/76485656657.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/QL4hfji/iowa_duck_season.pdfIn PDF document text
    • http://mifirejetevina.getenjoyment.net/48464089657.pdfIn PDF document text
    • http://monubagujizud.mywebcommunity.org/2415634060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481064/normal_5fd61a6ead9c2.pdfIn PDF document text
    • https://cdn.sqhk.co/liripudeb/waFggxA/30659742192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393625/normal_600bde84b4abb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487191/normal_6037811f1061c.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/hgKnWCv/texas_parent_connect_hisd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471081/normal_603553a2369a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383801/normal_601a12d072123.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_5cc302f49eda4706b82259dbe3a54188.pdf?index=trueIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_e71c959bedab4c40aca31b2078097452.pdf?index=trueIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_7c27abf68a3f4e0abf3b79a33257b532.pdf?index=trueIn PDF document text
    • http://gafijid.atwebpages.com/wolujumuruk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e018054b-960b-4ebd-a96b-d0f4a9cc89af/what_is_organizational_breakdown_structure_in_project_management.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_55d5f279f4064af697d03ee2943ffa6d.pdf?index=trueIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_228293b6cab44a8abcd15eff23d68ba1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2019e74b-f832-4475-8cf3-7dd4bcdfd2d7/what_food_products_have_gluten_in_them.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_off0000e296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE296 5244 bytes
SHA-256: c15b2ff2a052f78006a23b8d9b4f90f1613afc8ef15bed44b544c3d2a7a43ec3
font_01_sfnt_off0000f459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF459 10408 bytes
SHA-256: a3fed6b98f83245770fc46c0bd787040c259471fb60256c81a61b3a86f251c4c

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