Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f82401d93135b4c…

MALICIOUS

PDF

80.0 KB Created: 2021-05-01 05:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f637e8f9821daeb2a728cfbfc7a3796f SHA-1: a6773eab747747b385766d78b862fb176990f54a SHA-256: 4f82401d93135b4c15f92dd83b29a88629f6dbcc043ccf959aacb613e048daa3
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one pointing to a suspicious domain ('lozipotod.ru') that is flagged as a potential phishing or malware distribution point. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. No scripts were extracted, but the presence of external links suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/strik?utm_term=how+to+explain+time+management+skills PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387562/normal_5ff7d4210266b.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/91337645391.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/letter_a_worksheets_for_preschool.pdfIn PDF document text
    • http://zapitexidij.mypressonline.com/estado_definicion_politica.pdfIn PDF document text
    • https://cdn.sqhk.co/denirinodo/cDibOjd/hideaway_pizza_moore_delivery.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/giiaV6x/bewuz.pdfIn PDF document text
    • https://cdn.sqhk.co/towafeniruje/hguidL1/warlock_dawnblade_flying.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423715/normal_60174e6f01fde.pdfIn PDF document text
    • http://laketofetujeso.medianewsonline.com/33250466012.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385207/normal_601186bc3b154.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/32330457-fbae-45c2-b14d-ba3c70ce0474/are_directv_remotes_interchangeable.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/the_r_book_crawley_datasets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb999ef-e504-494e-bd61-9e72a3402857/python_dictionary_update_key_value.pdfIn PDF document text
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_1a542ffc1ec947e4ab881affe6caaedc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/2018_yearly_calendar_template_excel_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6bf4c72-9795-4ab2-ba25-dd785638f571/pentair_superflo_vs_pool_pump_manual.pdfIn PDF document text
    • https://44407f20-7244-4107-9544-84d8151b6f9a.filesusr.com/ugd/8508de_d591be9d99c249aba091a6e842b3f52f.pdf?index=trueIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_bd44b5352f5a46a18e589f590b6b5b82.pdf?index=trueIn PDF document text
    • http://refusunono.onlinewebshop.net/jibejikinunomas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e34fae-ced4-4ac6-ab86-fde64ee86f36/suzivugifemivepa.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_off0000fc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC08 5228 bytes
SHA-256: 998e3b2f25880e90f1db8447887d8e375e65993b005e285713a6f2877476a499
font_01_sfnt_off00010dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD4 10384 bytes
SHA-256: c575e8d3f1023b08d1f8eface2bc92fd6413f06376b38d2d7d50b4b726c220a4

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