Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad59095305d098a…

MALICIOUS

PDF

77.2 KB Created: 2021-06-13 07:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 254cc90026f598f7d18960194b3f32d6 SHA-1: 597592a57aee65b22c8a1c09553fe1f645291114 SHA-256: 2ad59095305d098ad28b22f6fef7e459619b92e75be7434dedf66e22c78a2e46
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic 'SE_LOLBIN_RUN_COMMAND' indicate potential for malicious activity, likely involving the download and execution of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://xajibur.ru/123?utm_term=free+a4+brochure+templates+psd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417212/normal_60b7f8d279540.pdfIn PDF document text
    • https://wetusaseri.weebly.com/uploads/1/3/5/2/135297966/dizonoruleved-giluwatatogigag-guniwivub-vezafomajum.pdfIn PDF document text
    • https://lelifomokul.weebly.com/uploads/1/3/4/6/134618459/mevisemuxuf-kekakonejoko-samego.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473041/normal_60594bd6609b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476281/normal_603514f8ea9b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416653/normal_6040b0a0bb57e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503874/normal_605d6c815b6cd.pdfIn PDF document text
    • https://zusadubojurumez.weebly.com/uploads/1/3/4/7/134703186/kekosiku_gonesawogolafox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476281/normal_6065999407ead.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415051/normal_5fed3dc25a1c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454691/normal_6033a80fe63d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_60b8b18ac365e.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/8e1ce30d-6f53-4cab-925d-13c2390de0b8/20048807977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b19c367-15b9-4502-9b8c-f2210a6c2eda/11506568596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f93fa71-0e9c-4823-ab9a-962266e353c0/vemimijowijakoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cbbafd4-dd85-46f9-9b1b-fda1d57bd9a9/cuentos_largos_para_nios_de_10_a_12_aos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f893dad-487f-4784-a513-fac1bc8e9c61/7585743153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/905d76c2-0410-45e1-99b1-e82df868807f/6485604411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c21065f-c948-4180-810b-e92c07547820/learn_windows_powershell_in_a_month_of_lunches_fourth_edition.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_off0000f0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DA 5496 bytes
SHA-256: 62fd6b7afe38c6552e08c14ec695473ce8d2669428e250bdf10e95fcfe002c2c
font_01_sfnt_off00010357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10357 10668 bytes
SHA-256: 1917157854177915264932087df214f5e291f542934b6ad2a95c87d8916edf12

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