Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ab4d994da78152…

MALICIOUS

PDF

86.0 KB Created: 2021-03-23 18:17:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5aeae02fb9e4caf321ccd8d3bb2ee29d SHA-1: 3150b99775a405fe16c21228930350547e7c686b SHA-256: 66ab4d994da78152144a0c92a856c470974e1d353d5705f3ca4bf62044b501ad
226 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the presence of embedded URLs and the 'SE_LOLBIN_RUN_COMMAND' heuristic suggest potential for executing commands or redirecting to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/strik?utm_term=best+wireless+mouse+and+keyboard+combo+in+india PDF link annotation
    • https://cdn.sqhk.co/keximovib/dmLE0a3/scent_of_a_woman_tango_scene_location.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/igdMhjr/riduvetawobuzolafegodip.pdfIn PDF document text
    • https://ganafotereko.weebly.com/uploads/1/3/1/1/131164127/sazujobodejig-doxexub-ritajizovi.pdfIn PDF document text
    • https://boxijobanopuvob.weebly.com/uploads/1/3/0/7/130739783/476613.pdfIn PDF document text
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/bc7473f.pdfIn PDF document text
    • https://bolifalaloken.weebly.com/uploads/1/3/1/4/131438202/5756119.pdfIn PDF document text
    • https://ferutijuze.weebly.com/uploads/1/3/1/8/131856408/43de1d9bd89c0.pdfIn PDF document text
    • https://rizomoxus.weebly.com/uploads/1/3/4/5/134589692/3558704.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/gO2RT6B/93461782329.pdfIn PDF document text
    • https://cdn.sqhk.co/webaxepibi/djcgehc/the_ants_go_marching_original_cocomelon.pdfIn macro / runtime command snippet
    • https://powumebaporisav.weebly.com/uploads/1/3/4/8/134891471/9165291.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/osiihdP/basketball_hoop_height_adjuster.pdfIn PDF document text
    • https://pawonojureva.weebly.com/uploads/1/3/4/5/134522231/makalamepopifi.pdfIn PDF document text
    • https://xovesoxak.weebly.com/uploads/1/3/0/8/130813458/1122869.pdfIn PDF document text
    • https://mefopati.weebly.com/uploads/1/3/4/8/134866381/4446225.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/falejogajir/pro_industrial_urethane_alkyd_enamel_data_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46b1a7bc-153d-4973-8fe5-d981986c9e2e/what_charger_does_ue_boom_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f04dc23-1d84-473a-be86-8335dcfe82e0/ragexaza.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/kofusiba.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/92506306317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e21ebc1a-b246-4e8f-b980-2254f3f61058/learn_windows_powershell_in_a_month_of_lunches_don_jones_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ff03f1-923d-4db5-be84-7cdc4501165e/74241876611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca5f892-3ed5-4ea2-9c24-32d0cfa9ba30/bowenizudarutabujitojo.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/lasurejabukapofepovet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e366673-bba9-4845-81ee-50bed79eebe4/ratubew.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/cash_flow_direct_method_format_in_excel.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_off0001110b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110B 5532 bytes
SHA-256: ea3c32736bb805aebe1bf613db3e02f58a0a306ec9aefc80fb526589bb755eb9
font_01_sfnt_off000123d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D9 11088 bytes
SHA-256: 6b148d64eb5f799982a8acdc04bf9bcdd74770d3075245171db317c80e1abfc7

Open this report in the interactive analyzer, or submit your own file for analysis.