Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ff1f2bd1182eda…

MALICIOUS

PDF

70.1 KB Created: 2021-03-06 15:17:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 74d3b7e63efe08d2d092f5728819560d SHA-1: b72ec016bf7ea2f245c56d2e84c0b05024d4f141 SHA-256: 03ff1f2bd1182edad23b2fc36f21bbff40a6fbe47bf4d6794e90f0a505e56933
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to direct users to malicious websites. The document body, though heavily obfuscated, suggests a lure related to online tests or programming, aiming to trick users into visiting the provided URLs. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to deliver a phishing or malware payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://baarspo.ru/strik?utm_term=c+programming+online+test PDF link annotation
    • http://wepisoja.mypressonline.com/manual_programador_rain_bird_esp-rzx.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/whcdhcM/vr_cartoon_360_watch_free_movies.pdfIn PDF document text
    • http://dibosezufo.getenjoyment.net/72361773784.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/zid5ixA/plague_inc_fungus_mega_brutal_2019.pdfIn PDF document text
    • https://sugowula.weebly.com/uploads/1/3/4/6/134646485/8ecbd40.pdfIn PDF document text
    • https://cdn.sqhk.co/zodunoxurob/5iiiajb/audio_mp3_cutter_mix_converter_and_ringtone_maker.pdfIn PDF document text
    • https://dewotime.weebly.com/uploads/1/3/1/6/131606762/8258f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487381/normal_5fd3453a9b082.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446773/normal_5fcca1652b0ae.pdfIn PDF document text
    • https://mabobuloxulekev.weebly.com/uploads/1/3/4/6/134692970/jiraxogiposagawure.pdfIn PDF document text
    • http://miribut.mywebcommunity.org/chakra_books_by_black_authors.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425501/normal_60279e52d17d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384046/normal_601442ab520d8.pdfIn PDF document text
    • https://niwuxepajo.weebly.com/uploads/1/3/4/6/134669398/10b7a6d.pdfIn PDF document text
    • https://popaxeras.weebly.com/uploads/1/3/0/8/130814769/fiwunopexaropapusugo.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/jggdEVK/metal_gate_strike_plate.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/kijokibenorisarepoxetafo.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/gdicKij/65781737796.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/jaxesabi/kafanutojufiwejiwola.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/giwageluwibasogibatage.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/adverb_clause_of_time_exercise_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/86258400576.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/20070990272.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/kitedojere.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/20712827176.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/cellist_at_royal_wedding_performance.pdfIn PDF document text
    • http://kuxemozoxabonag.onlinewebshop.net/91582339223.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_off0000d68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68A 5044 bytes
SHA-256: 42e81ab36e2f96cfcf99ee05d1d797b751f28a2d2d1a1bc08624d99215c37db6
font_01_sfnt_off0000e79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79C 10248 bytes
SHA-256: 40e0ec39d241e289666f1ff84771520ca902832fcc28f23eaed58e4e37886543

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