Malicious PDF — malware analysis report

Static analysis result for SHA-256 03706ac2890c69d2…

MALICIOUS

PDF

72.8 KB Created: 2021-03-29 09:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 020f71513a1d4fbacaf268a5d03549ff SHA-1: 53c7ec52cec19d590a777b6753b7da60fc44378a SHA-256: 03706ac2890c69d2f56ecec5922f3d75c60ae93166071bed624ad7628faad4f6
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 0.9996

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://botokaw.ru/award?keyword=el+misterio+de+belicena+villca+pdf+descargar PDF link annotation
    • http://fuvesozufinefi.medianewsonline.com/29553728329.pdfIn PDF document text
    • http://tanenabav.getenjoyment.net/bumipixuxenagubip.pdfIn PDF document text
    • http://4bochki.ru/formation_ambulancier_ile_de_francenmll1.pdfIn PDF document text
    • http://zerikasalokabef.iblogger.org/toserewukupaged.pdfIn PDF document text
    • http://prizinsta24.space/33155224612ugjew.pdfIn PDF document text
    • http://jumpfs.space/offline_battle_royale_games_apk0kn0j.pdfIn PDF document text
    • https://cdn.sqhk.co/fabokofe/cigtqib/history_of_art_2001_osu_quizlet.pdfIn PDF document text
    • http://katipef.medianewsonline.com/asma_bronkial_adalah.pdfIn PDF document text
    • http://tifalez.iblogger.org/23467418686.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/ljaOYid/9013900114.pdfIn PDF document text
    • http://lolkek.xyz/amazon_echo_instruction_manualpx1z1.pdfIn PDF document text
    • http://makeyourself.xyz/stanislavski_bir_aktr_hazrlanyork8m5x.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
    • http://lutolajawaw.rf.gd/management_report_format_in_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/589fb00a-469e-4669-84fc-306442b3decf/wudovewefu.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/sodiwoxukegekaxupasazike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e81d98ff-5a55-414f-9859-35692d171091/what_does_being_on_cloud_nine_mean.pdfIn PDF document text
    • http://vixalomoka.epizy.com/12068326372.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/numafel.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/sisidukefogi.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/mah_cet_mba_2019_application_form.pdfIn PDF document text
    • http://piredesoki.epizy.com/70652544612.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0EF 5420 bytes
SHA-256: ca7fe1f30cb877662b0a6f114c4ae36483048d6ee2986b2e8bc780fcfdac27db
font_01_sfnt_off0000e34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34A 11156 bytes
SHA-256: afb35fe9533dd8e8b453e4a7736e7c90b9577714b8011e8cfbfd715fc14d5c5d
font_02_sfnt_off000107a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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