Malicious PDF — malware analysis report

Static analysis result for SHA-256 39b870f0e2f6c0d9…

MALICIOUS

PDF

77.8 KB Created: 2021-02-14 21:20:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: a91424fac4420cf085334d65e175f358 SHA-1: 0d7b184717ef6aa7dd9d5cb6edcdde2b65e7d72e SHA-256: 39b870f0e2f6c0d96c58360708e7744cb7775a51444124dd9668d4bf42402d0a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=til+debt+do+us+part+gail+vaz-oxlade+budget+worksheet PDF link annotation
    • https://cdn.sqhk.co/depifozopupe/bnjhgch/64695722767.pdfIn PDF document text
    • http://wimisumuvov.iblogger.org/today_gonna_be_good_night_song.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/sjiIXjf/nbc_sports_chicago_bulls_live_stream.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/xWhFjfU/7493452753.pdfIn PDF document text
    • http://phrensy.co/five_pillars_of_islamic_religionzjmyl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_60256f64a0ce6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449000/normal_5fee458dc92d2.pdfIn PDF document text
    • https://cdn.sqhk.co/satovepato/Xibii7d/texebumexanibupubukijasod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481289/normal_6008305276b69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455881/normal_6011e2cb726d4.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/ratixifo/47039559235.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/89345603645.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/hyperloop_seminar_report.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/media_player_fr_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/13563869762.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/57591250080.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_off0000f236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF236 5676 bytes
SHA-256: 9f302a1f1ad655746161c30a0291a317de41444e7631e473bbfcf09945a04308
font_01_sfnt_off000105a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A3 10476 bytes
SHA-256: 0224698c29e306fa55e7c378455cfe53f591b1cbad37eef0db3607a02c3b73b3

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