Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa38e686d7cf693…

MALICIOUS

PDF

84.6 KB Created: 2021-03-22 22:44:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0444d943a779290b6bbd42975134a2ea SHA-1: d78d980ba41c170dcb8cacb3cdc6cb8ea3d20b6d SHA-256: baa38e686d7cf693f28916c4278c0286e885a3d185083f990ce1617db1cb1b5f
182 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a malicious redirector pointing to 'https://yafferge.ru/award?keyword=aws+certification+dumps+pdf+free'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'ML_NYX_PDF_MALICIOUS' strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains text related to 'aws certification dumps', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6590

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=aws+certification+dumps+pdf+free In PDF document text
    • http://tells.fun/sportcraft_air_hockey_table_dimensionsahvof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372721/normal_600745dd67b49.pdfIn PDF document text
    • https://cdn.sqhk.co/xederebat/6dnYr13/29158488341.pdfIn PDF document text
    • http://modarab.mygamesonline.org/cuento_el_barril_de_amontillado.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375196/normal_5ff64d8a83f05.pdfIn PDF document text
    • https://cdn.sqhk.co/libudezetuv/Qjiibgg/my_floorball_skiller.pdfIn PDF document text
    • https://cdn.sqhk.co/mobirewin/r6jhijb/21236610488.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/Zjdgahb/linear_regression_excel.pdfIn PDF document text
    • http://jovasetiveduza.scienceontheweb.net/62702460808.pdfIn PDF document text
    • https://cdn.sqhk.co/gagupedoxut/3jgEjc0/62208766091.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/107FNhj/lesoxadidejanebez.pdfIn PDF document text
    • http://fidafevemikiwe.mywebcommunity.org/22287554328.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/3iageid/dewuritinaxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482399/normal_5fff35f5c8b12.pdfIn PDF document text
    • http://uabiomanix.xyz/hindu_panchang_calendar_2019b10mg.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/flgdmjg/82919313906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448545/normal_60542b343bf11.pdfIn PDF document text
    • https://cdn.sqhk.co/timugulirebu/DgiPhpZ/bimuviladusev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413373/normal_604e98f2b9ab3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413373/normal_6025a45d478aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457839/normal_604367e619c92.pdfIn PDF document text
    • http://lenusabipowezo.getenjoyment.net/zozapefepaxeremo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461766/normal_60063750eb2d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bifovigavij.myartsonline.com/warapesapa.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C10 5348 bytes
SHA-256: 2a4e277cf08423349c19a08d855403c1ebf5cda9535b58a4e713bb68b969f88a

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