Malicious PDF — malware analysis report

Static analysis result for SHA-256 77dec00b31a2822e…

MALICIOUS

PDF

72.3 KB Created: 2020-12-25 19:36:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3047b83b0c044db49e02058bb119be12 SHA-1: d2c4f126196594b7d07e9b072988d722317eca67 SHA-256: 77dec00b31a2822ee03e081bd59c57f75cf6e497e65db3bf3286cd12623c3a16
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/aws?utm_term=allman+brothers+piano+sheet+music In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384167/normal_5f918bd11e7dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424630/normal_5fa63d3e331f2.pdfIn PDF document text
    • https://cdn.sqhk.co/gulijolane/ij4YhgA/yes_yes_save_the_earth_song_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/fiziroluj/jcqH7OJ/looperman_acapella_128_bpm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f891100d9f73.pdfIn PDF document text
    • https://cdn.sqhk.co/kobedobofepo/jajj1jd/nokia_loud_ringtones_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gisanewat/fNjchiZ/coupons_for_walmart_grocery_app.pdfIn PDF document text
    • https://cdn.sqhk.co/vutexexukus/ehfBhta/redcon1_military_discount_code.pdfIn PDF document text
    • https://cdn.sqhk.co/moradivovep/ieBRF7Q/dizukezirizijuguruz.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/zarelusipofox/36703060327.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/minecraft_infernal_mobs_mod_1._7._10.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/panduan_akreditasi_puskesmas_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/ashrae_standard_62._1.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_off0000de22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE22 5300 bytes
SHA-256: fc13a1f8b165a20d3635c59163ffb480fe505c0333ccab76461c0e3a244bc881
font_01_sfnt_off0000eff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF4 10744 bytes
SHA-256: 794b7a954a115584971fd07f2963caed1da2e9db473bee5633f727190d8c9ce8

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