Malicious PDF — malware analysis report

Static analysis result for SHA-256 24152d1f00fbc447…

MALICIOUS

PDF

82.1 KB Created: 2021-04-29 14:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1e4a5b793ca781a99072d9b62b0c88f2 SHA-1: 704b90516b779c6c53948233b9a02c16818dfd48 SHA-256: 24152d1f00fbc4470d1de74dc37e0aa3880e07749101f0b7f987526de3e89171
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://golowaki.ru/strik?utm_term=what+are+the+five+great+relationships+in+confucianism PDF link annotation
    • https://cdn.sqhk.co/rojarimeg/b1ggeJQ/miragine_war_cool_math_games.pdfIn PDF document text
    • https://cdn.sqhk.co/dapumexader/jiHiagg/defender_2_mod_apk_1._4._9.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/death_march_light_novel_volume_13.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/hahjNKO/centipede_infestation_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/flgdEgg/winupexijoguzefowewef.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/BK3jifZ/70787081100.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/ie2gchj/trap_adventure_1_apkpure.pdfIn PDF document text
    • http://fosavaxenu.mypressonline.com/kivunokigejagadavi.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/amend_text_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fixakozumad/VghTxjb/kojidikuligokojonobes.pdfIn PDF document text
    • https://cdn.sqhk.co/fefowofuk/giejcRW/donaravubenilukolugeda.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/how_to_apply_hair_dye_without_a_brush.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuxefunuzire.atwebpages.com/84254087303.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/what_are_the_5_ecological_relationships.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90a9e026-9f78-48a5-99e1-9ad71a5e20b5/jefupitojam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74242435-393b-48f9-8fb2-d20311c58db2/faruparu.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/all_cats_have_asperger_syndrome.pdfIn PDF document text
    • http://dezinolabebosod.atwebpages.com/25353902601.pdfIn PDF document text
    • http://gavawekib.myartsonline.com/48013331894.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_off000100de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DE 5500 bytes
SHA-256: c10015cdbe38551d5259b209d7e3622a16e1b7849474291cee04e629a704721d
font_01_sfnt_off00011387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11387 12404 bytes
SHA-256: 422aaf51db0d4203f188c062bbc595a50bd40b251567750bcbf3c9da74ab7e45

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