Malicious PDF — malware analysis report

Static analysis result for SHA-256 5295dd084ff8fe93…

MALICIOUS

PDF

75.7 KB Created: 2021-05-10 23:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 88eabeda54206f87b47a80deb80784ed SHA-1: d97ac668f7564d48e3e8fa56a808184e140ed899 SHA-256: 5295dd084ff8fe93756e2e6dda712b98325aac9b5ef41c5eb62e342566540d06
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://cdn-cms.f-static.net/uploads/4387939/normal_6017fb3783933.pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4419847/normal_5ff8632c63bef.pdfIn PDF document text
    • https://cdn.sqhk.co/sufiwotag/fjdidib/dermacol_foundation_shade_guide.pdfIn PDF document text
    • http://puliliraforuwu.22web.org/formal_attire_for_cabin_crew_interview.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496391/normal_6004eb66d98bc.pdfIn PDF document text
    • http://kugenezajiz.22web.org/lavetisixobokatur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368991/normal_606e3710381dd.pdfIn PDF document text
    • https://cdn.sqhk.co/jizapamilizo/YijQhfs/online_antique_auction_sites_other_than_ebay.pdfIn PDF document text
    • http://trydouche.xyz/pefaravirudinasatlpzgm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466368/normal_6027595121b8e.pdfIn PDF document text
    • http://natezaka.iblogger.org/pukinufozod.pdfIn PDF document text
    • http://lifeeuro.info/89535864857ssizr.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/IyggZgh/nomao_camera_for_android_apk_full_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/B9wesDdUo4k/wb?keyword=kindle%204%20battery%20ukPDF link annotation
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_9305e3e085a64a9aba21d589e21ccd1a.pdf?index=trueIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_e1a3f1a941824228ad2146e0e183553d.pdf?index=trueIn PDF document text
    • http://sodividupoz.epizy.com/algo_trading_strategies_book.pdfIn PDF document text
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_13c12bda8a284eedabc4d9f8005eb0c9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4488b89-e961-4f2b-bc76-9038bad059c9/4183961124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4402fc26-4512-47d5-b5c5-3597fffcb557/80721256258.pdfIn PDF document text
    • http://vilafaned.epizy.com/sandwich_theorem_calculus.pdfIn PDF document text
    • https://3c3b6f52-20a2-448a-be11-eec5930c502f.filesusr.com/ugd/0ca786_ae4efa94468e4de9a50a72a4dd315919.pdf?index=trueIn 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_off0000df09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF09 2996 bytes
SHA-256: fd7ca904a086d7e4d4549ff606d429cf8a246d475548939133b0259e316ca2cc
font_01_sfnt_off0000e9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CC 5004 bytes
SHA-256: c6d91763209fee2c30a937976e50fc1ade71dace14d550e7e132805324ef7d3f
font_02_sfnt_off0000faed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAED 11324 bytes
SHA-256: fd6510c261b422827efe0044ad5fb0b354c732d2bdba17a2709e37c2b072a279

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