Malicious PDF — malware analysis report

Static analysis result for SHA-256 547d9a34c8bc14fa…

MALICIOUS

PDF

82.2 KB Created: 2021-03-23 17:58:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f56282d243953eb14cb6fcf89fad96f4 SHA-1: b25bce61aeca30124a44daaf452b99cd54931ecd SHA-256: 547d9a34c8bc14facc8af161b4185180f847cb205650fa4b3b59fec4ec1df1f5
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-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://dugedepap.ru/award?keyword=abidjan+principles+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4504839/normal_602d5aa00eb93.pdfIn PDF document text
    • http://sodamasagu.66ghz.com/rijewotovilimefadajozaser.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495059/normal_5fd218ac8c5fa.pdfIn PDF document text
    • http://dawuxapi.iblogger.org/katyusha_guitar_tab.pdfIn PDF document text
    • http://tixugutag.iblogger.org/99526818732.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366015/normal_6003b1878fea9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5ff34fa41c13c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481510/normal_605037375153b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_5fd644f5bef00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424933/normal_604dc89cc2b27.pdfIn PDF document text
    • http://jumazeg.iblogger.org/losoverudegup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408990/normal_6049c29acbdfe.pdfIn PDF document text
    • http://zodoworusa.22web.org/kenmore_elite_dishwasher_service_code_f2e2.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
    • http://reledolikivep.epizy.com/62535649815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90012cc3-1586-48a0-911a-58a212b38482/how_computers_work_10th_edition_enhanced_web_version.pdfIn PDF document text
    • http://jofanebef.rf.gd/safe_victory_worship_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb0303ac-9c7f-4e3d-bc1b-b836496dcafc/kingkiller_chronicles_review_reddit.pdfIn PDF document text
    • http://vilatelisoto.onlinewebshop.net/tobekenuxapujewibi.pdfIn PDF document text
    • http://pixagikaw.epizy.com/number_writing_worksheets_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d303e9-2921-4d1a-9a7b-f582fcbab868/oster_steamer_user_manual.pdfIn PDF document text
    • http://bowegasobufur.myartsonline.com/antineoplastic_drugs_classification.pdfIn PDF document text
    • http://watenumedar.rf.gd/pubederavufabagekim.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_off0000f52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52F 4952 bytes
SHA-256: 6c72bbcfe66cf092edb74ca7e3726578ccef9820c3398a49ecd8dcf9d417f22d
font_01_sfnt_off000105fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FB 11744 bytes
SHA-256: e80053ad1c6b519e3b034ff76c76842f09d29864d943d1113a0680c773efff0b
font_02_sfnt_off00012d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D60 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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