Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9212305a09e7e2…

MALICIOUS

PDF

69.7 KB Created: 2021-04-02 21:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8eb70e4abf79ef5bcd52ccb3fc69f297 SHA-1: 13fcc91793269b76a5b949cd92faa9b84a9c9cc8 SHA-256: db9212305a09e7e2c30876d948a63f193084c99d9a92004cfac87b4163346c24
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 0.9998

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://druttle.ru/strik?utm_term=patch+para+pedaleira+zoom+505+ii PDF link annotation
    • https://zejenabo.weebly.com/uploads/1/3/0/9/130969472/lupogugatofun_zepufalizuwapil_mizomoxonevifog.pdfIn PDF document text
    • https://tufakuxumiwe.weebly.com/uploads/1/3/1/4/131454237/tabukamowobuf_fisil_dojuxupod.pdfIn PDF document text
    • https://cdn.sqhk.co/matelasoguje/3yOjfih/16507621310.pdfIn PDF document text
    • https://nasewinadomev.weebly.com/uploads/1/3/4/5/134521200/4d39af8b9.pdfIn PDF document text
    • https://cdn.sqhk.co/noligigibar/gYZKhid/forigi.pdfIn PDF document text
    • https://lukejofavum.weebly.com/uploads/1/3/4/4/134455809/mutawajinarumeg-bixarevopel-jorenavuw-kofawasivufebup.pdfIn PDF document text
    • https://kesiwupi.weebly.com/uploads/1/3/1/4/131407351/9a4b4c5b.pdfIn PDF document text
    • http://ganutaragifak.22web.org/pulawetarikisasevodevej.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/wopitadu.pdfIn PDF document text
    • https://kusawagefeduzuj.weebly.com/uploads/1/3/0/8/130874333/tinesefozode-pusol.pdfIn PDF document text
    • https://cdn.sqhk.co/gobavata/jif1nhd/amc_30_houston_closing.pdfIn PDF document text
    • https://xopubisewono.weebly.com/uploads/1/3/4/5/134507782/zuzejuzetisad-suzim-xerakidekosow-xunadavagewo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xerekexaxo.epizy.com/case_in_point_10th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70d79a91-13f3-4164-afbf-f98bce59f818/96130245420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6096b23b-c7af-4399-b0de-de48a9121781/56695888805.pdfIn PDF document text
    • http://vuzitugu.epizy.com/capacitores_en_serie_paralelo_y_mixto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d29be45f-5e03-40af-b816-aa90ec8b194e/mens_health_best_workout_videos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d822417c-ca28-4fea-965e-1c1ed36ae187/math_puzzles_for_5th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be9718eb-a913-4e18-bc9e-5f32c5557f79/ludusazolaluwuzona.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_off0000ceae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAE 5452 bytes
SHA-256: bbe762551e7dbcdbcbbffdc89f5e24e3f4a870549918ff36de28664959466e43
font_01_sfnt_off0000e118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE118 12236 bytes
SHA-256: 03577c9a1928232e027407d9bc14b84fe5ffa261500a337ca42930a797a7b13d

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