Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe5f23c4efdbf32…

MALICIOUS

PDF

97.8 KB Created: 2021-05-15 04:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 94629977b4a82cbfdb7e0ffc2ba9b558 SHA-1: e5821bc06501edfe46779b487357e8faa2138302 SHA-256: cfe5f23c4efdbf3231c2640f7882300cbc4611846a34d9264f6a72d2524962ab
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=ed+sheeran+castle+on+the+hill+lyrics+and+chords PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499622/normal_5fd198ea7485a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411229/normal_5fc7b36062eb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369331/normal_5fde56fa01138.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479904/normal_6048190f9a573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_6038834f73ccc.pdfIn PDF document text
    • http://rubisteq.online/stray_cat_doors_2_walkthrough_stage_2_extrahkdtf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489601/normal_5feea04be492c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384164/normal_5feed7ddb08b1.pdfIn PDF document text
    • http://ufenmac.com/bootstrap_3_checkbox_form-_group4qilc.pdfIn PDF document text
    • http://idealica-italy.site/142650868985a9hz.pdfIn PDF document text
    • http://igme.site/football_manager_handheld_2020_tacticsuqzij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491965/normal_600ee64fc2a57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/95becf9e-17c5-4ad6-a966-ff5044f4e160/gamapokenerenuduj.pdfIn PDF document text
    • http://zemipajobo.rf.gd/everstart_jump_starter_1200a_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f673bc-e107-46e2-a103-61696b9c2d66/the_secret_sharer_joseph_conrad_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58d16750-766b-4184-8216-3fac727426f3/xuvopizile.pdfIn PDF document text
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_6b8b4b6094f8430ebca57e8410302671.pdf?index=trueIn PDF document text
    • https://4b523d79-2bc6-404f-8e52-0acae4d2cb03.filesusr.com/ugd/fe1b41_22ffbda6e90b488eadd601ee30469146.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bebb815b-28ab-49f1-ac52-e2c3cde93504/28231085082.pdfIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_3c78ffeb59bb465487aa76438964a417.pdf?index=trueIn PDF document text
    • http://fobexegedun.epizy.com/manualidades_con_papel_iris_paso_a_paso.pdfIn PDF document text
    • http://jofosomorigifo.rf.gd/xagamebenopi.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_off00014031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14031 5088 bytes
SHA-256: 56a8e687fae433fbc3eea1551dc6fb39038ee7b962027b73cba18d8babb1430a
font_01_sfnt_off0001517e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1517E 11664 bytes
SHA-256: 0c24ac5309f12e40614ca6080e8aae515df5c83ede58099abe7389bc66d6aa00

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