Malicious PDF — malware analysis report

Static analysis result for SHA-256 3adce8cd54734f56…

MALICIOUS

PDF

78.4 KB Created: 2021-03-28 05:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c6ed43bd136d1f698b5b8a4c2a8f8655 SHA-1: 0683e162b60decab48193efdc352f8268b9a4eb4 SHA-256: 3adce8cd54734f562dc3e2f78a42192eb55d069c29bef31c3fda25a3a8b9dcd7
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The ML classifier also strongly indicated maliciousness. The document contains numerous embedded URLs, many hosted on disposable domains, suggesting a phishing or malware distribution campaign. The presence of external URIs and a link farm heuristic points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=how+to+use+verizon+jetpack+for+home+internet PDF link annotation
    • http://funafiwutera.iblogger.org/37365955878.pdfIn PDF document text
    • https://lumodafudewose.weebly.com/uploads/1/3/4/4/134480169/gixutafusuxug-jepibesonataliw-rabikas.pdfIn PDF document text
    • https://xopisamu.weebly.com/uploads/1/3/0/7/130776659/56016afb50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_60199e0052bdf.pdfIn PDF document text
    • https://cdn.sqhk.co/vamosopon/gfjeehh/vuvamiva.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/musitufuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463812/normal_6007d76432981.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393911/normal_5ffc649067c9e.pdfIn PDF document text
    • https://cdn.sqhk.co/vejanozugova/jdhdhbM/xipixelin.pdfIn PDF document text
    • https://xikefopu.weebly.com/uploads/1/3/4/7/134748362/miwuzebez-tokepivopa-dosites.pdfIn PDF document text
    • https://cdn.sqhk.co/mutobudenit/X7Mihjd/mountain_climbing_workout_machine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375341/normal_600fbb498db64.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/AihXgg6/67460292883.pdfIn PDF document text
    • http://vasetar.iblogger.org/bewobinusugazanemi.pdfIn PDF document text
    • http://notapeb.iblogger.org/twilight_saga_full_movie_online_hd.pdfIn PDF document text
    • https://gofadoden.weebly.com/uploads/1/3/4/6/134615513/vukijatadedinivile.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vimobuzu.epizy.com/fair_trading_tenant_fact_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/972caa1b-b459-4bb0-b1ef-1d18f5a2107a/654560378.pdfIn PDF document text
    • http://zodesozagusi.rf.gd/82737050965.pdfIn PDF document text
    • http://gagutaxu.rf.gd/2018_calendar_monthly.pdfIn PDF document text
    • http://kajomeki.epizy.com/wabadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9095e4-45e5-4f2a-aa94-4a5c12cd9592/is_php_still_worth_learning_2020.pdfIn PDF document text
    • http://niguroxutoginef.rf.gd/bebop_scales_piano.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_off0000f448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF448 5524 bytes
SHA-256: 094ea667f733065018819f6c89de2cafe7793a4b744ff9902e99711019bc95ea
font_01_sfnt_off0001070d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070D 10748 bytes
SHA-256: 6b0680378f6e5f2b4b242971cbe29afb893e5ae01add49b59f8e212b2cfe8297

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