Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d8f4f13d9ebd85…

MALICIOUS

PDF

73.1 KB Created: 2021-03-28 11:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8e99b5d47cc0ad19d628c607a4c338d0 SHA-1: 22ebd4f17faa5d72959161034e38f1c944f0c54b SHA-256: 22d8f4f13d9ebd85f9ea1c5b3a1f2ae1b6423467157e09238a933ed9478374df
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://xajibur.ru/wix?keyword=t-sql+table+stats PDF link annotation
    • https://vejugowe.weebly.com/uploads/1/3/4/5/134506523/gomefi-xorerufetadebo-garuruw-galil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485818/normal_5feaeefdbe9fd.pdfIn PDF document text
    • https://xobisejuzato.weebly.com/uploads/1/3/4/6/134694252/sezupiza.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/gifAqge/gukosovakalefilujewe.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/fetibu.pdfIn PDF document text
    • https://pasijafedi.weebly.com/uploads/1/3/4/8/134851145/nazaz.pdfIn PDF document text
    • https://kubikogemovi.weebly.com/uploads/1/3/4/0/134095998/9908340.pdfIn PDF document text
    • https://feravenokitaj.weebly.com/uploads/1/3/6/0/136095553/3605585.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475383/normal_60041ec0145d7.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/2jgihdQ/47352192136.pdfIn PDF document text
    • https://cdn.sqhk.co/fatobaliv/Ecghf4t/as_catacumbas_de_roma_em.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/ijShiQH/89658886068.pdfIn PDF document text
    • https://zaluzukefajol.weebly.com/uploads/1/3/5/4/135400247/mosel.pdfIn PDF document text
    • http://jabewes.medianewsonline.com/82803338014.pdfIn PDF document text
    • https://rizigavitud.weebly.com/uploads/1/3/4/5/134581125/2754284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387419/normal_600a02d0ce658.pdfIn PDF document text
    • https://wilowukodol.weebly.com/uploads/1/3/4/8/134881933/4583088.pdfIn PDF document text
    • https://cdn.sqhk.co/nizaveni/zEHgiOc/turkish_music_ringtones_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pogetowem.onlinewebshop.net/how_to_rebuild_small_engine_carburetor.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/suvefugopunapadunabiruva.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/tudowenotakut.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ded4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED4 4832 bytes
SHA-256: 80208d1426b99c97911031edeadef1313aa83c927e5aa04612200e878cbf4d8e
font_01_sfnt_off0000ef5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5B 11456 bytes
SHA-256: c0e06032e53455720887031e182eec18249bd726ef97e94aa1ffb96ddf5e2dc9

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