Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5204c7cb1890c6a…

MALICIOUS

PDF

71.2 KB Created: 2021-02-24 11:51:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c45316f5dbae8b7f0988bdc249f81291 SHA-1: dde9ea6cc31be41069c9773d123b28f47905f0ba SHA-256: b5204c7cb1890c6a6b084daa8a04d150c57a28c15287559c1c6a1c62246d20b4
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and point to link farms, indicating a phishing or scam attempt. The primary URL, 'https://maypoin.ru/strik?utm_term=wayne+dalton+garage+door+opener+reset+button', is designed to trick users searching for specific technical support into visiting a malicious site. The ML classifier and ClamAV detection strongly support its malicious nature.

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://maypoin.ru/strik?utm_term=wayne+dalton+garage+door+opener+reset+button PDF link annotation
    • https://mamowolo.weebly.com/uploads/1/3/4/7/134714390/fopese.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485434/normal_602eb4455772b.pdfIn PDF document text
    • https://xafasujogi.weebly.com/uploads/1/3/4/3/134374351/lodeguw-lemolozoniga-fopubabojoxe.pdfIn PDF document text
    • http://galoomer.online/download_tachiyomi_manga_apknnq3m.pdfIn PDF document text
    • http://valaxiwakod.22web.org/10796376698.pdfIn PDF document text
    • https://buriviniroxino.weebly.com/uploads/1/3/1/6/131606563/wijogafibolevagin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443815/normal_5fe150604fad0.pdfIn PDF document text
    • http://jujaxapuwuravof.iblogger.org/tafsir_al_quran_bangla.pdfIn PDF document text
    • http://dirtygirl.fun/audio_to_text_software_freezdhot.pdfIn PDF document text
    • https://ximapufem.weebly.com/uploads/1/3/1/4/131437784/5532f923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421767/normal_5fe99046a5e0e.pdfIn PDF document text
    • http://metalllift.ru/how_to_relieve_gas_while_pregnant7alem.pdfIn PDF document text
    • https://jenodaxadow.weebly.com/uploads/1/3/4/0/134012655/zekivuvufij-poxetisedug.pdfIn PDF document text
    • http://detonic-italia.website/vermintide_2_battle_wizard_buildwetvo.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://xidozex.epizy.com/gomubenukobipudojojebi.pdfIn PDF document text
    • http://torisesajew.rf.gd/backup_images_from_android_phone.pdfIn PDF document text
    • http://nivovagemesow.rf.gd/54601864307.pdfIn PDF document text
    • http://jevabatogi.rf.gd/resuv.pdfIn PDF document text
    • http://dimegebewode.epizy.com/coreldraw_x7_2019_kuyhaa.pdfIn PDF document text
    • http://vugixemavofagen.epizy.com/what_are_the_5_critical_thinking_skills.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_off0000ce84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE84 5216 bytes
SHA-256: 4dadd761b6cead3d336df8ff8e5901bf54913098a0feb3b5cc9ae7cff163451b
font_01_sfnt_off0000e05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05A 9644 bytes
SHA-256: e2a8d0fc849751de21031417f82c0e7cd35987663388768f2fc6929d22bd767c
font_02_sfnt_off0001016a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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