Malicious PDF — malware analysis report

Static analysis result for SHA-256 8648712f653051f6…

MALICIOUS

PDF

75.5 KB Created: 2021-03-02 06:10:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4fc3dea8027c8a3ac89ec7c817c3ea1e SHA-1: 5eb454f6f0049eb10ba54908f89e427405a756a3 SHA-256: 8648712f653051f68d75d8f8b92050de5fa56c7d1386e3a5a823f719b2fc534e
126 Risk Score

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=what+does+the+blue+light+on+my+air+purifier+do PDF link annotation
    • http://sutovuresas.mygamesonline.org/nike_baseball_team_sponsorship.pdfIn PDF document text
    • http://wemedimixodi.iblogger.org/32941068767.pdfIn PDF document text
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/nilogelujabavik.pdfIn PDF document text
    • http://moitender.org/jokeramalofirunxkj6.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/idjdhhy/75096872323.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/what_are_the_important_uses_of_report_writing.pdfIn PDF document text
    • http://changely.club/how_to_tell_the_age_of_my_lennox_furnace82t6o.pdfIn PDF document text
    • https://volorizog.weebly.com/uploads/1/3/1/0/131070051/dazogebisibi.pdfIn PDF document text
    • http://saramigubenegit.22web.org/titawegonetafebemuvi.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/lg_direct_drive_washing_machine_error_codes_oe.pdfIn PDF document text
    • http://italia-doc.fun/64591047318neosq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/whats_your_star_sign_if_your_born_today.pdfIn PDF document text
    • http://rawigukegopafot.onlinewebshop.net/25310179049.pdfIn PDF document text
    • http://lewinozed.atwebpages.com/fodoliboref.pdfIn PDF document text
    • http://negavutagogo.epizy.com/43769362352.pdfIn PDF document text
    • http://siwemoxoxawevuv.atwebpages.com/43551897710.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/two_way_radio_shoulder_holster.pdfIn PDF document text
    • http://medidadebi.rf.gd/98120966490.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/sidopen.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_off0000e702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE702 5712 bytes
SHA-256: 1be6e80bcc22ea136959778d6bc84aee08b8580545793c4ea3035e3a0f1e8ac3
font_01_sfnt_off0000fa5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5B 11288 bytes
SHA-256: 57b1f0a9b27dbadfd49b28b9c7fa318beb6ae8f2c872054717ae528bc3ddfb11