Malicious PDF — malware analysis report

Static analysis result for SHA-256 5021bf562b760453…

MALICIOUS

PDF

71.8 KB Created: 2021-06-11 05:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 726b9c630b26ea5b3752f7fa86ea3100 SHA-1: 9a959a348d547318732d3140abb62ba89a3710a1 SHA-256: 5021bf562b7604533aed579242fe1cfea5bb94f7fb3b95690afa606c4666429a
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 0.9993

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://huntic.ru/pbw?utm_term=pinoy+teleserye+replay PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473938/normal_5fd078b73dc9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426408/normal_601432aa1ed57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493888/normal_5ff5400cf20a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450034/normal_603f1a9eae491.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486563/normal_5fe1018a2f387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390643/normal_60bc2d40404c6.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4416672/normal_60afe7f2acc63.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/4b85f47d-47f3-4087-975c-1ba103aff47d/portfolio_outdoor_low_voltage_lighting_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bdec0fc-9eeb-4c60-a8bd-272ea3a4c88b/5037108368.pdfIn PDF document text
    • http://kefimazusob.pbworks.com/w/file/fetch/144424623/11522464588.pdfIn PDF document text
    • http://jasiduvegulu.pbworks.com/f/82320855364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fe8a7fa-80ec-44f0-a3c9-60037e901c7f/16124495377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e662e992-464f-4110-b2d6-991d27f2dab1/how_much_to_build_a_wordpress_website.pdfIn PDF document text
    • http://fuzobonesujo.pbworks.com/f/ap_chemistry_hesss_law_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f01414e-9e46-4f5e-8a5f-b33b81407b5a/85383508088.pdfIn PDF document text
    • http://bawamotijeku.pbworks.com/f/vpn_turbo_premium_apk.pdfIn PDF document text
    • http://mogulazedub.pbworks.com/w/file/fetch/144511680/67926618368.pdfIn PDF document text
    • http://kosumepifise.pbworks.com/w/file/fetch/144774513/levifagosopaxowawusipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a8df554-4bfc-4626-ade7-8b060d13c5af/ejemplos_de_proyecto_de_investigacin_cientfica_sobre_el_medio_ambiente.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f3752f-0b5f-4cb7-a0b2-9d8f4874d5f2/98799073534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d4dcaa7-cd7b-49aa-8776-1a10859ba3d4/92900903692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b72db8-d79f-4501-9c21-3cec63f2af37/jbl_sb200_speaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6cd5fe4-9f94-4acf-8494-98ae6a1711ae/is_there_any_romance_in_the_mistborn_series.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_off0000dbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCF 4916 bytes
SHA-256: 29e494694c52ec14e9869426a68c4e8f28c350a9580e44152cb527a9bacfc225
font_01_sfnt_off0000ec9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9C 11004 bytes
SHA-256: f14efb13914789826750ce0200338c4e9499e62f383507a03a74dea362b4dfb3

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