Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a95d2edebd409f…

MALICIOUS

PDF

75.0 KB Created: 2021-05-16 13:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 94a61a72f5f9a70143c76d052320d69b SHA-1: afe4c022372d72a9b8d248f42224c673647e9d64 SHA-256: 39a95d2edebd409f7460247b894fdd9fb7ed8ff195e05dd05242b95d3a1ab3ab
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one pointing to a suspicious URL that appears to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the presence of many external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=take+five+sheet+music PDF link annotation
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/giwamenegema.pdfIn PDF document text
    • https://weworikifuga.weebly.com/uploads/1/3/4/5/134515792/8716521.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392451/normal_5febb75ddd2cf.pdfIn PDF document text
    • https://durirumis.weebly.com/uploads/1/3/3/9/133999752/e9ee197f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455660/normal_60201510f220f.pdfIn PDF document text
    • https://lewibodozibepa.weebly.com/uploads/1/3/3/9/133997785/959af95a168f.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/lemerisinivum/opposite_adjectives_with_pictures_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/gotekozadesas.pdfIn PDF document text
    • http://tisikifapov.rf.gd/83057685672.pdfIn PDF document text
    • http://sotilikesad.epizy.com/abcd_2_full_movie_720p_openload.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/wiwiz.pdfIn PDF document text
    • http://norenuwidubeg.rf.gd/95313251853.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/37282599501.pdfIn PDF document text
    • http://vobipugiwexidu.epizy.com/birthday_girl_penelope_douglas_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/camera_360_terbaik_untuk_android.pdfIn PDF document text
    • http://supedir.epizy.com/47118811640.pdfIn PDF document text
    • http://taguminuligifis.rf.gd/gavawupadetijamowa.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/airway_bill_of_lading_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/rich_dads_cashflow_quadrant_guide_to_financial_freedom_audiobook.pdfIn PDF document text
    • http://lulanikigog.epizy.com/zonetifenerowewode.pdfIn PDF document text
    • http://jodofinefurow.rf.gd/electronic_battleship_game_pieces_names.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_off0000e916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE916 5068 bytes
SHA-256: 2af8069fecedf106d8dadf7bacf7a68ae3f63d657f4b19822991fee745038a58
font_01_sfnt_off0000fa44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA44 10720 bytes
SHA-256: 4130086a8bfd0d4a8a350eade07c880fd7e96bb2fd7b7e8b6d6e86883163d764

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