Malicious PDF — malware analysis report

Static analysis result for SHA-256 079e5f5a0300c354…

MALICIOUS

PDF

75.5 KB Created: 2021-04-08 08:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 03f96a0cea9dcc3d23cf6fa25fd50d4d SHA-1: 19adaa464448e4f280e87440f6dc3e2eff94929f SHA-256: 079e5f5a0300c354dd25079a73927d7a4289dacad1b0ff095f77e3b4240a379a
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 0.9990

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://gimoguvi.ru/123?utm_term=concise+mathematics+class+9+icse+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406464/normal_60452eea0f75a.pdfIn PDF document text
    • http://mosdendy.store/zamovj6uz1.pdfIn PDF document text
    • https://cdn.sqhk.co/toxaxiked/gfhgljd/tejifegaxiwuzipolojobodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405925/normal_60613c51d847a.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/ztgifgj/slot_car_racing_tracks.pdfIn PDF document text
    • https://cdn.sqhk.co/jerowerar/XP2Zoia/lerifabexewegemowal.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/cIggmDo/zujanje_u_usima_kod_djece.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/dhagfge/disable_bluetooth_terminal_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/RDdOmJC/14760436042.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/x0iihjC/xenutorasuk.pdfIn PDF document text
    • https://cdn.sqhk.co/naxibibu/7jawiUy/wadanazosunokaku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485821/normal_5fcc594842fb3.pdfIn PDF document text
    • https://cdn.sqhk.co/divoxisig/gj0zDkN/57965505092.pdfIn PDF document text
    • http://fringigejy.site/81234653409j2s.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/dgdjdhb/83164224058.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/ujhaUjj/download_royal_robots_battlegrounds_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475863/normal_6020befd6462f.pdfIn PDF document text
    • http://fredo.bike/nonton_film_subtitle_indonesia_the_producere6jew.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/iHhfoib/dolemi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469374/normal_6023bc25901af.pdfIn PDF document text
    • http://beliyden.xyz/27827838080hxhlp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/44129951648.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/41588046540.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/grade_1_maths_worksheets_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/sports_hd_dv_1080p.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84E 5320 bytes
SHA-256: 9c26a1952976d174bd0c2571dc6b37f6be981033874d75017f7c7344acbfab51
font_01_sfnt_off0000fa38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA38 10580 bytes
SHA-256: d4a8baff6f97ad8cdfa584c710351242dadc7360199ce5de05a06634b0f2649c

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