Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee97391e8a9273b…

MALICIOUS

PDF

79.0 KB Created: 2021-05-05 15:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 29dc5646fed1adb8c9fde1fb0701ed1f SHA-1: 5fbe50c152dd03801d317d6176453da14ad6c28f SHA-256: 1ee97391e8a9273b22dd0cf2f28111128630006136300f669e2a9f52ae7bfc57
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as book downloads, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://ponafet.ru/strik?utm_term=libros+de+paulo+coelho+once+minutos+pdf+gratis PDF link annotation
    • https://sudarixadozitot.weebly.com/uploads/1/3/5/3/135331315/7611963.pdfIn PDF document text
    • http://danoguvokapijof.medianewsonline.com/23974422470.pdfIn PDF document text
    • http://pemizirevubel.mywebcommunity.org/buerger_disease_indonesia.pdfIn PDF document text
    • https://fodoradesak.weebly.com/uploads/1/3/1/4/131454556/mizakipived.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408461/normal_6053257bb1fbd.pdfIn PDF document text
    • https://sapurokegija.weebly.com/uploads/1/3/4/5/134577933/74b30c5aabdfb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462726/normal_602d07d1e275b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421615/normal_603b43c2d0b0e.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/zoology_honours_syllabus_2020.pdfIn PDF document text
    • https://vidatizotasajad.weebly.com/uploads/1/3/4/0/134017381/zokufafadatiko.pdfIn PDF document text
    • https://fibumexil.weebly.com/uploads/1/3/1/0/131070733/750600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422136/normal_6020965ee9d91.pdfIn PDF document text
    • https://pupizotewijuguw.weebly.com/uploads/1/3/0/7/130775862/zigofamesidema.pdfIn PDF document text
    • https://menixikamu.weebly.com/uploads/1/3/1/4/131437341/sadiraje-dubuponepuz.pdfIn PDF document text
    • https://nipujari.weebly.com/uploads/1/3/1/3/131384055/bisabidibinajo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nisoxow/samsung_55_inch_premium_uhd_tv_-_series_8.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/autodesk_autocad_2016_trial.pdfIn PDF document text
    • https://53002a68-e35f-4167-ac88-1ab9777d7e72.filesusr.com/ugd/f5bc2a_2fbda05aea674b9a8efefdf8b2dc2900.pdf?index=trueIn PDF document text
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_e8986aaf4532410ebb5f208a5cd2256e.pdf?index=trueIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_596f2854f9f442078430ef4a1814afb5.pdf?index=trueIn PDF document text
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_a1d1e4cc6e7844cd91ebd82391bcd907.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/23857583179.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/dasosaliwipimonejega.pdfIn PDF document text
    • https://b913155d-2712-4fd4-bcc6-651970a8c456.filesusr.com/ugd/e39924_619fabb1e85e460898222a6d6a4e8068.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/cbse_syllabus_for_class_9_science.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_off0000f384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF384 5652 bytes
SHA-256: ae301d2b23f77499d44b66cbf692e3d573794925733ad335db056f9520a3db47
font_01_sfnt_off0001068a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068A 11720 bytes
SHA-256: a07dbee3f40b6860d65b67791437dd156f71927eb4362e6a22f15f6f3a51c563

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