Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d876a14db1e003…

MALICIOUS

PDF

75.3 KB Created: 2021-06-10 08:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c01fddf66ca20c7bdf7c0effa6af0100 SHA-1: fd6d5d10eedb6435873da9da6cb825dbf787ef1b SHA-256: 62d876a14db1e003ac5ed6c26b86c32d02e143956e0a4d4227dcf74d10b2dba1
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://golowaki.ru/123?utm_term=pokemon+moon+post+game+guide PDF link annotation
    • https://vorupegesozuzow.weebly.com/uploads/1/3/1/4/131453293/0fccac.pdfIn PDF document text
    • https://xomadugazulu.weebly.com/uploads/1/3/4/5/134597447/57f33536c25e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_601ec6bd6227b.pdfIn PDF document text
    • https://botosedasirewen.weebly.com/uploads/1/3/5/9/135961685/ab223001e71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420903/normal_600158f761e49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_602af9f257be1.pdfIn PDF document text
    • https://kinurilidere.weebly.com/uploads/1/3/1/3/131379896/kufixefetufe_dewoj_suwirezozirun_doguzopegof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_600c850716fdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407316/normal_5ff83d3747da1.pdfIn PDF document text
    • https://gebowajawuma.weebly.com/uploads/1/3/4/5/134582097/fojukejomunite-gogam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://morabef.pbworks.com/f/what_does_afp_test.pdfIn PDF document text
    • http://sisagexal.pbworks.com/f/landscape_history_and_the_pueblo_imagination.pdfIn PDF document text
    • http://kodalomibika.pbworks.com/f/dil_to_pagal_hai_song_free_download.pdfIn PDF document text
    • http://lipovosufuk.pbworks.com/f/nututosemevoriv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6260e06-4fd4-4454-b04a-eaa6bb53a35c/5920199337.pdfIn PDF document text
    • http://fotowefufet.pbworks.com/w/file/fetch/144628437/punctuation_worksheets_for_3_grade.pdfIn PDF document text
    • http://buzivevej.pbworks.com/w/file/fetch/145026771/5248302246.pdfIn PDF document text
    • http://pewamez.pbworks.com/w/file/fetch/145019595/xojokexufigovowudu.pdfIn PDF document text
    • http://werinenimuta.pbworks.com/f/adobe_creative_cloud_desktop_app_full_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38e7cb07-ea42-47cd-8db6-bd679b02d063/nofivab.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_off0000e79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79C 5216 bytes
SHA-256: a7beac4fa2052e82129dcdeb7088decc511d10f11011cdf9c5675d4de4ca4385
font_01_sfnt_off0000f955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF955 11028 bytes
SHA-256: 7dac239d6a0d3b83ba567fc0a420eed31068d59f7f63c3b2157c2c2c1a113770

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