Malicious PDF — malware analysis report

Static analysis result for SHA-256 2df354983e6d2357…

MALICIOUS

PDF

80.7 KB Created: 2021-03-08 08:12:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 976e0fd1a7628d98fef2ebd28a8f1cde SHA-1: 6273f8e31f4cc6f19f809cf0792d3796fbb9cc4d SHA-256: 2df354983e6d235724358a75330c6963e68a3f7a4aa27bbc176ddff6d6242b8b
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that lead to disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/award?keyword=nova+video+questions+hunting+the+elements+answer+sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494669/normal_6014e86b6c59b.pdfIn PDF document text
    • https://cdn.sqhk.co/pogadidotilu/iehheja/vadafenokuxopatekijalo.pdfIn PDF document text
    • http://sluzhba1.net/lego_75038_instructions946nd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486997/normal_6033fa8ab40a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_602227f727170.pdfIn PDF document text
    • https://bozobazevadetob.weebly.com/uploads/1/3/1/6/131607158/fajonovuzaloxe-kamiparo-tisobi.pdfIn PDF document text
    • http://arthromedro.xyz/finatujonase7n74q.pdfIn PDF document text
    • http://gratoramm.website/87638769334afacq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369779/normal_5fe4b736ab6da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375355/normal_602ff5ce5cda4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466676/normal_5fdf8cf7bf492.pdfIn PDF document text
    • http://instasurprise.online/snake_identification_east_texas02zi3.pdfIn PDF document text
    • http://milesnires.xyz/cuanto_equivale_2_metros_en_milimetrosm0gj3.pdfIn PDF document text
    • https://cdn.sqhk.co/papedajapej/haFZgfx/crushed_ice_color_palette.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464710/normal_60242928e8477.pdfIn PDF document text
    • https://wepusetu.weebly.com/uploads/1/3/2/6/132695333/6483604.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jolivawojo.rf.gd/date_format_in_rdlc_report_expression.pdfIn PDF document text
    • http://jisevara.rf.gd/zibejoziluk.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011833.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11833 18164 bytes
SHA-256: f4cc0bab221de0c409f37b5e0d64113d7eb16e0b9fb3d4e626b9922ed3314b7d
font_00_sfnt_off0000e2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AF 5484 bytes
SHA-256: ce5aa1474ddac2067c089ccf116880afc0c28d420e8bd325e2ee0090ba98cccc
font_01_sfnt_off0000f541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF541 10136 bytes
SHA-256: 239fa24897f634687cf34e11a00fca6ca034872f40714334a672ebb6e21612ad

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