Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d273e51a21dd6ed…

MALICIOUS

PDF

78.5 KB Created: 2021-02-12 15:12:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 212540e51d7a4bbd0b9dc37be21ee72a SHA-1: 48c1c74134c0ceb5e4417747636d5a7b13516522 SHA-256: 9d273e51a21dd6ed4c24944020aa94e70704f41c48762aa26114742b49938c50
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to trick the user into navigating to a malicious site, aligning with spearphishing tactics.

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://bologen.ru/123?utm_term=sound+intensity+and+the+decibel+system+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454808/normal_5ff9a7ba0c260.pdfIn PDF document text
    • http://sikepelisu.22web.org/film_3_alif_lam_mim.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/lefisovafupagufasxinj.pdfIn PDF document text
    • http://2220202.ru/android_watch_faces_rolexjs7ci.pdfIn PDF document text
    • http://dhl-order.info/38420172716swgk7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_60151ccd1c727.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jovekus/sample_questions_and_answers_for_ielts_speaking.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/33694216449.pdfIn PDF document text
    • http://kidagemomosate.epizy.com/64002848414.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/movopozoxuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/58171491281.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/anbae_per_anbae_lyrics_video.pdfIn PDF document text
    • http://gexegufikide.epizy.com/sofev.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/ardaas_karan_2019_movie.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE833 5500 bytes
SHA-256: 776928c81acb46218a3ac59853ebd52d3e206d69133a1bbff94f0004fe10129d
font_01_sfnt_off0000fabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABE 10432 bytes
SHA-256: a0acbc55a9c9a066be1e1071981a83a96274fbffceace262b7c25dbbaf3d9f91
font_02_sfnt_off00011e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E84 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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