Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4982ded4bed3f2…

MALICIOUS

PDF

73.9 KB Created: 2021-04-21 21:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ad7be0127462d086f1535930a2ac0798 SHA-1: 560c61973ab223db3a31a0073f4a9cb8c73680dd SHA-256: 5f4982ded4bed3f2b856d6cd166b842223d2fb0f31f9344290323f99656f893a
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-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://xajibur.ru/strik?utm_term=free+printable+baritone+ukulele+chord+chart PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448345/normal_5fe190f27f46a.pdfIn PDF document text
    • https://nixalimug.weebly.com/uploads/1/3/2/6/132680811/200e558cd3d.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/0gfibfc/lafixugi.pdfIn PDF document text
    • http://tikanaw.mypressonline.com/rovudemowikenusonado.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/K5hdXMp/fortnite_rocket_launcher_locations_chapter_2_season_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369315/normal_600391102153b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482645/normal_604df3fa9bf99.pdfIn PDF document text
    • https://miragitoketulo.weebly.com/uploads/1/3/3/9/133997248/wabolepagomet-vadoned-dabizuwinafiluw-mufojolitubo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_605b0c010929d.pdfIn PDF document text
    • http://myyshooop227.site/warcraft_adventures_lord_of_clans_walkthroughcq3nf.pdfIn PDF document text
    • https://fifikasato.weebly.com/uploads/1/3/1/4/131437502/5565838.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/bilbao_map.pdfIn PDF document text
    • https://cdn.sqhk.co/nifijagik/8IJghge/14075530116.pdfIn PDF document text
    • http://losqutoq.online/34026162808g3bwe.pdfIn PDF document text
    • https://cdn.sqhk.co/viposaxa/T88jghf/gps_maps_navigation_directions.pdfIn PDF document text
    • https://gasodugolulo.weebly.com/uploads/1/3/4/3/134375537/duwidi.pdfIn PDF document text
    • http://kittyplay.online/john_deere_9500_combine_horsepowerhv1dp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378607/normal_5fc623d590c9f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_2630be4624c24fefb668d0ebd32b92d8.pdf?index=trueIn PDF document text
    • http://wipadafefuxasi.onlinewebshop.net/dumuporumokofo.pdfIn PDF document text
    • https://2b075577-062e-477b-ba44-a680027dca12.filesusr.com/ugd/ee943f_c843df8983a8454c86f8ee450509fa60.pdf?index=trueIn PDF document text
    • http://rabatelekovufar.myartsonline.com/carbene_notes.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_off0000e763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE763 5140 bytes
SHA-256: 4baa18a0db94cc8a9c1ea4f87e03ebf3d9fffbd6a2a84654abcc64998364434c
font_01_sfnt_off0000f8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D0 9752 bytes
SHA-256: 25ccd5245d0b2dff1eb48addc37f43bdccef7856204527d4674abacfa673f6b8

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