Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7e43fefc4b8fb5…

MALICIOUS

PDF

92.3 KB Created: 2021-04-26 01:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6e217828612f3b852b3dba490f8dd35d SHA-1: 1ace74f3621cd0229614895f49c2c6980d05fd51 SHA-256: da7e43fefc4b8fb579c009f32af36add6b7de671411156ec40754086f8dc777b
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The document contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting an attempt to redirect users to malicious sites. The presence of 'utm_term' parameters in some URLs indicates a phishing or spam campaign context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/strik?utm_term=harry+potter+e+la+pietra+filosofale+libro+inglese PDF link annotation
    • http://zomolejefej.mywebcommunity.org/types_of_asset_classes.pdfIn PDF document text
    • http://majusenise.sportsontheweb.net/holt_mcdougal_algebra_1_notetaking_guide.pdfIn PDF document text
    • http://technodom11.com/t_fal_ultimate_ez_clean_3.5_l_deep_fryer_reviewu2sr3.pdfIn PDF document text
    • http://xogavuw.medianewsonline.com/marginal_probability_density_function_example.pdfIn PDF document text
    • https://cdn.sqhk.co/sepagumal/jeD5lbn/vizugamonaf.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/S2qkzif/22877007395.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/malukitaligemabefegamevo.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/4iGjjOm/83757046631.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/fRY36OY/91361748732.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/19959169441.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/kewawes.pdfIn PDF document text
    • http://nesobaka7.xyz/36449381625utkt9.pdfIn PDF document text
    • http://fafijitesulexiz.mygamesonline.org/fogibowax.pdfIn PDF document text
    • https://cdn.sqhk.co/gumakulex/gMjdJjz/baker_business_3_premium.pdfIn PDF document text
    • http://eglo.club/electricity_and_magnetism_worksheetdfe76.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/f5827eeb-6cf6-4827-b189-ec7fa39ff15b/how_to_delete_mint_transaction.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/vanaseraguxide.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/67169656345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c42b54b-b651-4e14-9111-f2e6e488ceea/phonological_awareness_apps_for_older_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa3b2ca9-7593-4653-90fd-1ebe2eabe0df/maxizezinitunijozakopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f11567f-2e01-47fa-b9ba-f93a267a6896/36656231614.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/weather_report_for_garner_state_park.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3745b34b-6db5-4822-8b21-eb35319c1b41/self_reliance_emerson_paragraph_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/factoring_by_grouping_worksheet_answers.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_off00012453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12453 5272 bytes
SHA-256: c52fcbc61e65ac44a2b828d2207349dd75a4aefab7a5e285906bcd71ebf71d39
font_01_sfnt_off0001365a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1365A 13576 bytes
SHA-256: 5a5f5f0dec33d0bf42d5d0dc7cb21d037aca4dbafb7a696893fa991207a45149

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