Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb42afae37a9f71…

MALICIOUS

PDF

85.8 KB Created: 2021-03-09 13:28:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f82a79f43f37d8f81f7eea603fb9de8f SHA-1: 975c4a57a953a2bda36024f82f50c8f324b832f5 SHA-256: ccb42afae37a9f715be645b0d9dd3e216df99d864943f243f45b52df5b7c1c5a
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-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://botokaw.ru/123?utm_term=krishna+bansuri+dhun+music PDF link annotation
    • http://rilomenininun.getenjoyment.net/happy_ending_movie_song_download_bestwap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_6030a67ead8ba.pdfIn PDF document text
    • http://kismykeitio.best/3230779429nka1w.pdfIn PDF document text
    • https://cdn.sqhk.co/sexifirume/dU9jeqC/lujizadufijobudomumos.pdfIn PDF document text
    • http://kovatafob.mypressonline.com/ielts_academic_reading_real_test_with_answers.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/vefelajedumamufiva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424645/normal_5fd1c01dbfdf9.pdfIn PDF document text
    • https://cdn.sqhk.co/tifisizeliz/jdM9NiC/alien_arrival_rotten_tomatoes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454544/normal_60097763a241c.pdfIn PDF document text
    • https://zexuboru.weebly.com/uploads/1/3/2/6/132683252/bogifijadozalevo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388063/normal_5febbe203423f.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/jghgegd/gaming_wallpaper_for_pc_hd_4k.pdfIn PDF document text
    • https://maxanijalezo.weebly.com/uploads/1/3/2/3/132303118/zazufekuwif-dikevu.pdfIn PDF document text
    • http://hiziryigit.online/721148050855cia1.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/xasubinorodakepave.pdfIn PDF document text
    • http://kijekidajefi.getenjoyment.net/92147557713.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477910/normal_5fff614c4c24e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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_off00010247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10247 5256 bytes
SHA-256: 3bacfec7dc54fa4d99292be095d7835fe93f43ff93a73dfe79be3bd995d1df44
font_01_sfnt_off000113fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FC 13000 bytes
SHA-256: a7a83904df32c4863b0445c68ddd4f4bed8195a0dc5f850ec59c9b09c7df98ce
font_02_sfnt_off00013bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BFA 3560 bytes
SHA-256: 1a545690a6973aaa91e8e7b4c7c64f80fc4e2d3fe85b761b2b300dd148d52f67

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