Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e632a50782b7ae…

MALICIOUS

PDF

80.9 KB Created: 2021-02-18 17:05:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c5e5c0edc23046d5b1263e8533ab68e3 SHA-1: 9c8d8faf1bd41853151f9aa03dc0b303181163b8 SHA-256: 23e632a50782b7ae1795ffd80d48df874281d2e14e36520dc21dcf23db26e79f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that, when clicked, leads to a phishing page disguised as an answer key. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple suspicious URLs suggests a phishing campaign aiming to deliver further malicious content or collect user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=ray+tracing+mirrors+and+lenses+gizmo+answer+key PDF link annotation
    • https://cdn.sqhk.co/vixonafom/hbE0kif/lebetujixufelapuzepad.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/pwljfgw/descargar_pokemon_masters_ex_apk.pdfIn PDF document text
    • http://vitezozikupu.iblogger.org/wedding_website_templates_free_bootstrap.pdfIn PDF document text
    • http://matteset-spon.space/dora_and_boots_best_friends_forever5uxg4.pdfIn PDF document text
    • https://xomijati.weebly.com/uploads/1/3/5/3/135329577/703c36d1f116f.pdfIn PDF document text
    • http://my-favshopf.online/86528563879kqa7p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449411/normal_5ff4dea94bc6a.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/i0AH9ib/jalogoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421039/normal_601e213d1fce3.pdfIn PDF document text
    • https://kebiluxo.weebly.com/uploads/1/3/1/4/131455508/fopolomenadof-nifano-pejigi-wibotefikibu.pdfIn PDF document text
    • https://tajixuxax.weebly.com/uploads/1/3/4/7/134751877/beregojuvuviwem.pdfIn PDF document text
    • http://upgrade4me.com/wapisakigc8vae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467032/normal_600d917858b40.pdfIn PDF document text
    • https://gunagejosiva.weebly.com/uploads/1/3/0/7/130738835/venujojufux.pdfIn PDF document text
    • https://cdn.sqhk.co/pilimisoduk/bnjjKq3/14954761396.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/novifamigot/suntory_holdings_limited_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/beekeepers_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/2340443021.pdfIn PDF document text
    • http://vaguwiraji.rf.gd/bible_prophets_timeline_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/after_the_sunset_hd_movie_free.pdfIn PDF document text
    • http://xajulazozu.epizy.com/wondershare_filmora_filehippo.pdfIn PDF document text
    • http://megepivafigu.rf.gd/naa_autograph_movie_audio_songs_com.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_off0000ff3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3C 5576 bytes
SHA-256: 5c58d5cf9124e668b7795f0d6859ff2a017257da7470f187ec13f0932c4a0f2a
font_01_sfnt_off00011248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11248 10520 bytes
SHA-256: ce4ed5e209427cda6cd03adf6fa4d58c4d2bb4ca172312d85e1c7db12cb4472a

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