Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3133d0e77436cda…

MALICIOUS

PDF

88.0 KB Created: 2021-04-19 05:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3524cc8759c7f2177b3f8ae3dab8a191 SHA-1: 175027b4ace46313621fc12be9819a54f905cc5d SHA-256: b3133d0e77436cda147b4febd755e3402c6dd5065828f9368894249b2e95f704
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 0.9997

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://maypoin.ru/strik?utm_term=describe+the+order+of+the+sun+earth+and+moon+during+a+solar+and+lunar+eclipse PDF link annotation
    • http://2220202.ru/69215872048rq3a0.pdfIn PDF document text
    • http://kositexujir.sportsontheweb.net/22214359643.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501794/normal_5feb8cb65d8c4.pdfIn PDF document text
    • http://setofexperience.site/rovepikekajemetubojijokoj8lyo.pdfIn PDF document text
    • https://cdn.sqhk.co/nitagalut/kihibPh/38402575688.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/gITwehb/kh3_monsters_inc_boss_guide.pdfIn PDF document text
    • http://suvuxivenorum.mypressonline.com/alfabeto_braille_para_imprimir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368767/normal_5ffa862ce8a2a.pdfIn PDF document text
    • http://topchambre.xyz/the_power_of_one_book_quotes_and_page_numbersj7o0p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388183/normal_602641068886d.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/bxRBuuU/tap_training_snake.pdfIn PDF document text
    • http://astrohelp.space/invitation_for_meeting_email_templatef308n.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzowadijavu/giLtL1n/google_play_games_apk_for_android_7._0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/turip/disorders_of_protein_metabolism.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/machine_learning_with_r_the_tidyverse_and_mlr_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/961a4b88-5609-419d-b2b6-7d229b42ca0a/tisomu.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/pibedadisujof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e3f180f-5fe9-46dc-a984-2be3c382b76a/minn_kota_riptide_ulterra_80_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1794feb6-d810-4410-a8d3-048ea246ab6b/62857650387.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4B 5588 bytes
SHA-256: 712e4d4a0ae177d273c53ed9de0d74e026f209aff0edd53b154c84c47e9734f2
font_01_sfnt_off00011e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E17 10980 bytes
SHA-256: 10c15d4204befd27f36df2399595fc45ed22dc791b817993d960eab6046f7cd8
font_02_sfnt_off00014394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14394 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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