Malicious PDF — malware analysis report

Static analysis result for SHA-256 86da2298fd182e10…

MALICIOUS

PDF

71.2 KB Created: 2021-02-21 00:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 8b1c31600e0c37e19a4d019bf749b3d2 SHA-1: ae298b07b9ab8ebc1e2c62a5fbfc98e059bc8553 SHA-256: 86da2298fd182e10d064c98607d5c2a777ce5aebe29e7c9750053b445d197a3b
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'baarspo.ru', likely serving as a lure to a malicious site. The document body's content, though garbled, suggests a deceptive pretext related to a 'Michael Vey series list'. No scripts were extracted, but the presence of multiple external links and the overall heuristic profile strongly suggest a phishing or malware distribution attempt.

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://baarspo.ru/strik?utm_term=michael+vey+series+list PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463287/normal_601f551174704.pdfIn PDF document text
    • https://redikuvemezu.weebly.com/uploads/1/3/4/8/134872152/a6274fdfa85e.pdfIn PDF document text
    • http://s7hmus.org/sipiwowawinogatubepef5eita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476010/normal_5fd91b1835b14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388620/normal_60149d9c54011.pdfIn PDF document text
    • https://cdn.sqhk.co/lebereme/gZicmSW/dupagovodaxurafamajorov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446034/normal_5ffc87a5acec3.pdfIn PDF document text
    • https://masejufubalabej.weebly.com/uploads/1/3/4/3/134388341/ditizotumaket.pdfIn PDF document text
    • https://womerakuketuzal.weebly.com/uploads/1/3/1/8/131856195/vuvisowepozab.pdfIn PDF document text
    • https://kamedewogivazu.weebly.com/uploads/1/3/4/0/134096977/jobugosodu-nobuwowiren-tufiwediwimil-buripamapazizol.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/dcgcKhh/royalty_free_sad_music_free_download_background_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366005/normal_5ff7bab05c8b1.pdfIn PDF document text
    • https://cdn.sqhk.co/gudopokobipa/SgcdgjZ/pulademasedujakudosi.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/wejuvono/calculo_trabalhista_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/ap_bio_exam_review_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/information_of_sheikh_zayed_mosque.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_off0000da43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA43 5056 bytes
SHA-256: e7a00f97c6a6509103ff08b71bd852fe2490ea74eaa157682ff103434ac2e740
font_01_sfnt_off0000eb84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB84 10904 bytes
SHA-256: d242d4dafa27e942f5d96e7b412df114b9801872eb67783724d407f2891a6a34

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