Malicious PDF — malware analysis report

Static analysis result for SHA-256 a223269ab80bc1e7…

MALICIOUS

PDF

69.7 KB Created: 2021-03-19 10:06:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b3ecdd248bbf7240e287836e3647e285 SHA-1: d50314fbad4958a26bfd4d16aba998c02c32b597 SHA-256: a223269ab80bc1e74d0d68d4cfa375902d160f833653e75847067b07a8765581
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-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://golowaki.ru/strik?utm_term=barnett+wildcat+c5+string PDF link annotation
    • http://toworugesolur.getenjoyment.net/turuwotes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448347/normal_60468ff63d29b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453098/normal_6053f08cb6284.pdfIn PDF document text
    • https://cdn.sqhk.co/nalomuxe/4Lbemhb/funudiluxogafegoweguxe.pdfIn PDF document text
    • http://shopee24.site/saguniwoqh.pdfIn PDF document text
    • http://expo-kit.ru/zotijumowunb7rbx.pdfIn PDF document text
    • http://pesuloduf.medianewsonline.com/best_bass_guitar_for_beginners_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377414/normal_5feb16bf7edb6.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/Yyicihg/autonics_panel_meter.pdfIn PDF document text
    • http://lnstagramoriginal.com/forensic_science_textbookgyj01.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/visenoj.pdfIn PDF document text
    • http://promooffer.site/dark_alliance_gary_webb_san_jose_mercury_newsfx00n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2206a7d-42b9-4455-9767-77f478c53733/google_image_search_remove_exact_size_or_larger_than_tools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d06f7d-963b-42d2-83b6-0b6820c10584/arbonne_host_rewards_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e74546c7-bc92-4e08-ae4d-25ed5d35d8e6/masanodarosojamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caa7b3bf-7327-46c6-af29-dae2820d92cb/xufoxovujimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34754b37-565a-49c4-91eb-7243359b1936/50_shades_of_gray_book_order.pdfIn PDF document text
    • http://tuzuxutetug.atwebpages.com/48838715905.pdfIn PDF document text
    • http://vajapojaperusu.myartsonline.com/28545996592.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD151 5372 bytes
SHA-256: ee30b464f3d430bbcc83d781cff01ecfa04a5c01507e32bba2a09dbc392dbb8a
font_01_sfnt_off0000e3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B4 10764 bytes
SHA-256: 1b44d06c89e6ca9718b676a55627fba44e8a8ad92c3579dd7b53dc52b6ac9b4f

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