Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c7d2744c5e11b0…

MALICIOUS

PDF

73.5 KB Created: 2021-04-24 01:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9b20ec59ebf1cac7b0be53abd5c9896b SHA-1: 543dd7fa51e8be7b47bca02b5cb6e554948ab34d SHA-256: 80c7d2744c5e11b00683ba37bdba65e2a7a1c93e20e3e68264101cfa61219fe2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/strik?utm_term=what+does+it+mean+when+your+fire+alarm+blinks+red PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368503/normal_6050b88f448f6.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/gctiaFq/sosomiziso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382643/normal_60010965d8c6f.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/fugibGT/real_vs_fake_air_jordan_1_dior.pdfIn PDF document text
    • http://foguwefo.iblogger.org/52265954396.pdfIn PDF document text
    • https://cdn.sqhk.co/mudinaxape/2W1yjXL/skins_among_us_free_version_2020_latest.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418968/normal_600c06a1a4c80.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/gcjhA45/wexigifuji.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/hgJDYji/14576928917.pdfIn PDF document text
    • https://cdn.sqhk.co/duburijudi/udb7aii/17488113311.pdfIn PDF document text
    • https://cdn.sqhk.co/jifibipex/6gghiih/simple_keyboard_notes_for_tamil_songs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387243/normal_601556066e074.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/iaqAnSG/44379313522.pdfIn PDF document text
    • http://mimasajikataza.iblogger.org/91463450395.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koxikid.epizy.com/apa_yang_dimaksud_juz_amma.pdfIn PDF document text
    • http://tevoxuvi.rf.gd/spotify_premium_free_apk_xda.pdfIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_9aae829300b94139862104741fe47b79.pdf?index=trueIn PDF document text
    • http://wepuwuzuvam.epizy.com/zisagomezilesuwexifujipom.pdfIn PDF document text
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_e37a0c108ca14aafb72c21160728225b.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE271 5560 bytes
SHA-256: 0d41b77c2d5d9ecb1613ce0dc0d663aec4cfdb853115f1e2a0ffb636c92d8513
font_01_sfnt_off0000f54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54D 10280 bytes
SHA-256: 152f44fec43f0ae4c9e4eb36a6ba5dac39ec253d79afdb85e6433147cc900e56

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