Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6ed03713d8a9a2…

MALICIOUS

PDF

153.0 KB Created: 2021-06-01 20:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a9ffdb94d2f8ac3bb25c676db314af1d SHA-1: 0ac8e8fdbc10ac6a56af8483970bdf47f535b4f1 SHA-256: de6ed03713d8a9a2f4d9064441669c57b3a11aef271107d68d3df458e8499d7e
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 0.9992

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://coretry.ru/pbw?utm_term=peter+lynch+beating+the+street+reddit PDF link annotation
    • https://gixoxiri.weebly.com/uploads/1/3/4/7/134707295/522109ce3.pdfIn PDF document text
    • https://defagetomorig.weebly.com/uploads/1/3/4/5/134576552/kirilesorirowu_nasotesitel_lebokojuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_600a4904e0556.pdfIn PDF document text
    • https://mugilofovoki.weebly.com/uploads/1/3/4/6/134616553/varegezupe.pdfIn PDF document text
    • https://majawisalopor.weebly.com/uploads/1/3/5/3/135300577/7849211.pdfIn PDF document text
    • https://pesuzipowezav.weebly.com/uploads/1/3/1/6/131636843/redokufo.pdfIn PDF document text
    • https://wiwupaluw.weebly.com/uploads/1/3/1/6/131606778/3778624.pdfIn PDF document text
    • https://gaxepofujar.weebly.com/uploads/1/3/5/3/135348048/fefup.pdfIn PDF document text
    • https://zemexiwo.weebly.com/uploads/1/3/4/3/134321437/tafebemuvumonag-dunap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475864/normal_605709eba4849.pdfIn PDF document text
    • https://pudawiwut.weebly.com/uploads/1/3/5/3/135342926/sujetibizi-turinavuw-sinikorijeli-raxotisupuwesa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ronuzexem.pbworks.com/f/java_tutorial_oracle.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/f/libro_de_nanda_nic_noc.pdfIn PDF document text
    • http://sorawako.pbworks.com/w/file/fetch/144450072/sovunelagupiveje.pdfIn PDF document text
    • http://zikupuzajix.pbworks.com/w/file/fetch/144444735/pitch_perfect_2_movie_download_in_hindi_480p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a6c526-14ad-4675-a778-8307f699b9f6/literary_devices_in_the_crucible_act_2.pdfIn PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144425286/angry_birds_pc_games_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87d663af-8118-4e37-ba58-f9b77d0017f5/30723388219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2763a17c-9b3d-4b9d-b337-578bd3543c12/the_chronicles_of_narnia_prince_caspian_full_movie_english_subtitles.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_off00020ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20EF0 5444 bytes
SHA-256: d12e2b908af096304d54765a00e7c6dd84e7cc022e30d0daaecbca048e588c51
font_01_sfnt_off00022165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22165 2116 bytes
SHA-256: 316f78c6e162999e43ccb83d429ef85c46045bf1ac59c77d169faf589ecd4eba
font_02_sfnt_off00022b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22B0F 12396 bytes
SHA-256: 59c24e9c489401ce1ca57b57beca1e706a68cf71146c84dccfa09ea4c8984f01

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