Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e8cbbbdb5644e1c…

MALICIOUS

PDF

72.2 KB Created: 2021-02-24 19:05:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 3b8028f69e5c68adf54891ecf1bc546f SHA-1: 241b409a712cd4915e40eecb0dd6417ea2989007 SHA-256: 2e8cbbbdb5644e1c061f1b427f829869901103929b25c1c66ad6694626b5cde6
166 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many of which are hosted on disposable domains or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains text that appears to be a lure for users searching for specific information, directing them to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://jottigo.ru/strik?utm_term=what+are+adaptive+skills+for+preschoolers PDF link annotation
    • http://jedomagisuw.getenjoyment.net/rosudajiboxatokuwiritex.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/g9ieshg/filujamavogugevok.pdfIn PDF document text
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/zogozuta-migogipexu-kodutitifanil-foxonepar.pdfIn PDF document text
    • https://pojojozujivalim.weebly.com/uploads/1/3/1/1/131164399/wuvapobujagilu-xuwetaxize.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/brookstone_wireless_speaker_recall.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/ijib7jb/launcher_ios_14_premium_apk_download.pdfIn PDF document text
    • https://xivexibajewubud.weebly.com/uploads/1/3/1/0/131069970/1708578.pdfIn macro / runtime command snippet
    • http://pubedetavilew.22web.org/58089355605.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/dTshaie/true_football_manager_mod_apk.pdfIn PDF document text
    • https://jijoforupet.weebly.com/uploads/1/3/4/8/134864875/84b6c10.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/harbor_freight_scroll_saw_vs_wen_scroll_saw.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/ijiIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/najipavez/basiwoxetunaviguparufudov.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/4363558198.pdfIn PDF document text
    • http://xexitotikix.rf.gd/boyce_avenue_greatest_hits_free.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/how_do_i_update_my_garmin_nuvi_2595_gps.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/how_to_do_wave_curls_with_flat_iron.pdfIn PDF document text
    • http://mejefelutirarej.epizy.com/persona_5_kaneshiro_boss_fight_guide.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_off0000dd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD96 5380 bytes
SHA-256: 4ef78770ea351eec543dc7245f60702dd3ee3f3ba7bd91586958efcf0e6b2329
font_01_sfnt_off0000efee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEE 10440 bytes
SHA-256: a6735af0ab85d19bd50ab0a9a9d7ee52d59d32d4b9d58058f011160ca821b751

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