Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45dc6a0e15edd80…

MALICIOUS

PDF

84.0 KB Created: 2021-03-11 13:35:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 29f3b5872a4a6fa872b8db268880d8d0 SHA-1: e349238a4e2adb9743ec9e504a4549ccb2fc9cb4 SHA-256: f45dc6a0e15edd80375832a22be67f18ad1130cb752d42f31c8545b5bd38966b
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-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://jottigo.ru/aws?utm_term=how+do+i+manually+regenerate+my+water+softener PDF link annotation
    • http://ebay-coupon.ru/personification_in_lord_of_the_fliesk4dya.pdfIn PDF document text
    • http://demask.space/auvio_bluetooth_speaker_troubleshootingqdw33.pdfIn PDF document text
    • http://texno3ua.com/lexila1iv2r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369343/normal_5fcd1aac4e592.pdfIn PDF document text
    • http://italysummer.space/examples_of_social_contract_for_the_classroomglq3q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409827/normal_5fe64c6193890.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422385/normal_603944e8874bc.pdfIn PDF document text
    • http://freshmind.net/xozizontm0mz.pdfIn PDF document text
    • http://reduslim-official.website/59201865404146bw.pdfIn PDF document text
    • http://help-bluebadgecenter.com/analyse_swot_exemplegt6i5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393209/normal_6026ac6c7acf3.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/384128db-355c-40ef-87df-b1ed146b466f/lawesikevo.pdfIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_5e3ccf1b40964ae8af70bb14f7baec69.pdf?index=trueIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_bd2d651b7b174faba0dee564108ead44.pdf?index=trueIn PDF document text
    • https://3c199e1c-ff83-4553-a351-db1e9419129c.filesusr.com/ugd/424a74_40c2dffbd9d843f3971eececa3d090c1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a14c8f6-3817-4d2f-acd0-562c0a393056/how_to_get_rid_of_pimples_scars_fast_at_home.pdfIn PDF document text
    • https://be5a03d2-cb36-429a-bb4d-4773f067dd3b.filesusr.com/ugd/b46ca8_a28d95fcdab446ca815bef6bd810d5e7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d23dec-c02d-40c0-8626-c3d1c88990de/dadego.pdfIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_ebf4cc75eb75425bb8d0430eaa6d6def.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/08538def-02b8-446d-8ecd-373a856eaa53/jamulixoxosibabikixojizo.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_f9afc2f2926c41daa707fe83d1c75b9e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1690bee0-6607-4da2-9de0-ca36f01da588/67626121930.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_off00010b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B77 5384 bytes
SHA-256: 9e5b1420d0d3fedc74753a895e8eff1d59619a77d5e0eda54aada75b6e64f1e6
font_01_sfnt_off00011dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC3 10576 bytes
SHA-256: ae42818acddef85274b50c14f4e0352b38748a3fe209d525fc6e23f04c302dcf

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