Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cddecdf0de0a659…

MALICIOUS

PDF

74.5 KB Created: 2021-03-23 00:06:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 63f0513f5b7e44f184f65c2e8b501b78 SHA-1: 9114252ff5b4a5c948420096d42bd2e17224aaeb SHA-256: 2cddecdf0de0a659af11e6e9e29324a644bf7e717dc6b24af3459baaab3dc607
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=broadcast+live+ti PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444114/normal_5fe8aa92006e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447915/normal_604f02a0af22f.pdfIn PDF document text
    • http://sifuzifixezija.medianewsonline.com/calendar_2020_malaysia_template.pdfIn PDF document text
    • http://sqrab.top/forgotten_gods_grim_dawn_mapx7v6g.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/H62NSjb/92513536168.pdfIn PDF document text
    • http://rodisawikikofu.medianewsonline.com/triveni_turbines_campus_placement_papers.pdfIn PDF document text
    • http://pumaguli.scienceontheweb.net/17669621748.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/86629797478bx2wu.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/les_miserables_broadway_movie.pdfIn PDF document text
    • http://nujagexurej.medianewsonline.com/nugukimunu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_6016cbc5da4b2.pdfIn PDF document text
    • http://cooldomen.space/srsd_writing_modelonz4j.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/fLhhghX/cycle_racing_games_bike_rider_racing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413109/normal_5fcc93bd3cead.pdfIn PDF document text
    • https://cdn.sqhk.co/bisegepamitu/gxQBif5/dojonego.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuzobisu/hgPggYQ/tolixazajuxejijozos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369322/normal_60392e02a103a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_3d445637ab854a428ad367ced530bf1b.pdf?index=trueIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_9c4c33ef996f4e73be9564515f18b85f.pdf?index=trueIn PDF document text
    • http://pikubub.onlinewebshop.net/aircraft_maintenance_technician_jobs_canada.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89D 4724 bytes
SHA-256: 4b9f8c3972b4e829104d8c516ddd4b28ff3d9a15e10263493597c06ee52e6e75
font_01_sfnt_off0000e8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BB 10988 bytes
SHA-256: 2df89f5f3f22478b4016733138cef00bff4e96fad9507c41a93d0ab919db6de4
font_02_sfnt_off00010dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC3 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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