Malicious PDF — malware analysis report

Static analysis result for SHA-256 983c0deff0a8fb68…

MALICIOUS

PDF

79.4 KB Created: 2021-03-30 16:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fb6c2d32f2626bdb6c2c2decbd886bd2 SHA-1: 1cfeddbc00154e079f9a3999af780ddee0fee1ae SHA-256: 983c0deff0a8fb6847cd514fd73f063fd4a1fbb4259024335bd5f75d2ffe3267
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 0.9995

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://bologen.ru/strik?utm_term=once+more+to+the+lake+response+questions PDF link annotation
    • http://cybety.xyz/73240463489nlc4n.pdfIn PDF document text
    • http://talkme-news.info/rudurobufakitej133.pdfIn PDF document text
    • http://ig-soft-team.com/billyoh_playhouse_instructionsdrvdy.pdfIn PDF document text
    • http://agentsoft.space/39704882814a74db.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/calvin_klein_female_underwear_size_guideyxtlh.pdfIn PDF document text
    • http://vodoroding.info/69254109079rdvqt.pdfIn PDF document text
    • http://gnoogle.site/1786601217802zrd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450438/normal_5fd89c08a9e2c.pdfIn PDF document text
    • http://persequen.com/tufexupuvunebodonasijuwe5d2fl.pdfIn PDF document text
    • http://top-odejda.com/dukekonuriremeeo0w8.pdfIn PDF document text
    • http://gutprod.xyz/mukurapi47t9k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410020/normal_5fc68bd94a8be.pdfIn PDF document text
    • http://laxana.ru/how_to_break_down_a_taurus_pt111_progmo0e.pdfIn PDF document text
    • http://astropsychology.website/fisokimanigosyoiwm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474446/normal_60513df753047.pdfIn PDF document text
    • http://yildirimotobursa.com/510950902150drgm.pdfIn PDF document text
    • http://groby-ritual.online/13243613614vw59x.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://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_0b595f5ed5de4b7fb17979055b8b7f49.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c2f57d9-b504-4361-9377-d29775ddd690/xewelarilevejofemajuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2403f02-0ae9-46f8-b792-090bd4e2578d/troy_bilt_tb225_tiller_parts.pdfIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_7f5982514fb74600b6a9c88efa473650.pdf?index=trueIn PDF document text
    • https://b7c6a474-53ed-4139-af63-4b2f501ae0e7.filesusr.com/ugd/e87294_53aec97940fb414e952f2306f621ace6.pdf?index=trueIn 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_off0000ec7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7F 5272 bytes
SHA-256: 68f174f1062c45e2137fafce16fb2f9bd37d6045d5710cb0b14da85029e1c28e
font_01_sfnt_off0000fe39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE39 10380 bytes
SHA-256: 2d9745a2aabeb78f81f68a56930c22e58d09b63a94df02795ffc083f0e8c2def
font_02_sfnt_off000121b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B3 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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