Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f4872c86f8883e…

MALICIOUS

PDF

74.2 KB Created: 2021-01-16 15:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b71d58dcba78bea2bfe53d7eddfd9f55 SHA-1: 1f4173d97158d98ef589183e45f18f39559790af SHA-256: 39f4872c86f8883ea9f7fd3e0dd18eb3892f2800870c1b511250364315db1800
154 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. The embedded URL is likely intended to lead the user to a compromised site or download a secondary payload.

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
  • 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.
  • 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://cctraff.ru/123?utm_term=kenmore+freezer+model+253+not+freezing In PDF document text
    • https://site-1176088.mozfiles.com/files/1176088/49053521716.pdfIn PDF document text
    • https://site-1174461.mozfiles.com/files/1174461/anari_film_song_ming.pdfIn PDF document text
    • https://cdn.sqhk.co/depifozopupe/jgUqQhg/how_to_cook_chicken_leg_from_frozen.pdfIn PDF document text
    • https://bodonoweti.weebly.com/uploads/1/3/1/8/131856710/559738.pdfIn PDF document text
    • https://site-1178489.mozfiles.com/files/1178489/43959159693.pdfIn PDF document text
    • https://site-1178814.mozfiles.com/files/1178814/pocket_ledger_app_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/gifexajed/h0P7ies/hype_remixes_on_soundcloud.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/QoQwihs/download_anger_of_stick_2_mod_apk_revdl.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/sifawekujiki/32977206713.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/bronfenbrenner_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/89860694793.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DF 5068 bytes
SHA-256: 516f838e895d6c83db8998db3dd2a9226cda0c46adf2e31b00e115adc762f4f2
font_01_sfnt_off0000e912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE912 10856 bytes
SHA-256: 9792d416e59a790106523ee8a4afaadc50b5ad532fb715d088747097544e82d4
font_02_sfnt_off00010dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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