Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d07f74450f2f24b…

MALICIOUS

PDF

87.8 KB Created: 2021-03-18 11:27:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 26cd55d87cab4421e8f5d166f95ee6a7 SHA-1: 23e874bb30b0cf4df4b19619d3ac74f51269e44f SHA-256: 7d07f74450f2f24b93a39853603ada5b34c9f55e955d5f3158cdacb35741d7bf
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 0.9991

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://maypoin.ru/award?keyword=angina+estavel+tratamento+pdf PDF link annotation
    • http://mexicotop.xyz/livuxiwejidegzjqoy.pdfIn PDF document text
    • http://vurejowug.mypressonline.com/wolexeseg.pdfIn PDF document text
    • http://eurosett.net/template_slip_gaji26r2p.pdfIn PDF document text
    • https://tefeteti.weebly.com/uploads/1/3/0/9/130969297/lolufaxen.pdfIn PDF document text
    • http://tokudujadi.medianewsonline.com/13718993795.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486778/normal_5fcb3863ef9b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488569/normal_60393d2fcbdba.pdfIn PDF document text
    • http://itdiscounts.info/35510924018mlbkv.pdfIn PDF document text
    • http://nelodagavezes.mygamesonline.org/sepadarujabodinanubupagen.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/probability_mass_function_vs.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/meteorology_today_ahrens.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/how_did_the_maze_runner_1_end.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443357/normal_602e6b391abca.pdfIn PDF document text
    • http://wumomotetidofe.getenjoyment.net/4053914068.pdfIn PDF document text
    • http://devicesprotectionforusers.site/pokaxumutotovwit08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_60482889c38dc.pdfIn PDF document text
    • http://hookup753.fun/48903877334e2lts.pdfIn PDF document text
    • http://fijubigatusurov.scienceontheweb.net/jalanakarob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423154/normal_60341bde573e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370560/normal_5fe75a4b3b9e5.pdfIn PDF document text
    • https://kerizivol.weebly.com/uploads/1/3/4/6/134665291/1075711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465538/normal_603085a60f4ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://danebusuji.onlinewebshop.net/49377595017.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_off00010812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10812 5200 bytes
SHA-256: eb77c2e94b5a9cfa193aadfbd90705dac1ef3da955731bc4c9afb598439ac007
font_01_sfnt_off000119ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AC 13252 bytes
SHA-256: 37a85ce806aec7f35ed39fbdd3baaeee9854895751b4e9b9540482baea0771a0
font_02_sfnt_off00014237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14237 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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