Malicious PDF — malware analysis report

Static analysis result for SHA-256 885e2e26f7750ff3…

MALICIOUS

PDF

71.2 KB Created: 2021-01-09 12:58:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e6bd770f2851a8bfdcc202822df6e10f SHA-1: 592d933f6cdb3183fe80ad109b4a73da7e01ac59 SHA-256: 885e2e26f7750ff31c8c0c1f0d10dbf64f212b7ac838da7563b50b74e16ff5d8
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 0.9997

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://ggtraff.ru/123?utm_term=the+developing+human+clinically+oriented+embryology+11th+edition+pdf+download In PDF document text
    • https://cdn.sqhk.co/loxowopiv/Y3H8NNu/sky_whale_game_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/guregame/HogjiaD/fortnite_skull_trooper_4k_wallpaper.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456984/normal_5fdf56be2770f.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/mesotodimus/taquicardia_sinusal_tratamento.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/equivalent_expressions.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/math_worksheets_for_grade_10_icse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a0b7e4a-ce80-49f8-a39b-4d551d006bc8/cisco_wusb54gc_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/lexolirape.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/simon_and_garfunkel_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52eb45b8-144d-492a-aed6-1b9378753ff6/3571780988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eb1285b-0bf5-4301-80fc-28cd376683d7/yellow_cab_pizza_menu_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e701f680-03c9-49b5-b087-23d2048a15a3/voworoxovabova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67f7ab46-4bbf-4631-a16d-47db35713532/natid.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_off0000d901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD901 5784 bytes
SHA-256: 9ae2e83e7dc477479515977ede2de7bb9988cd680cf2b2fb56aeaeae091a686f
font_01_sfnt_off0000ecac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAC 10192 bytes
SHA-256: 0dac1b9b7842785b5a0cbd63bfb670779332e324708972aa28857759ed9fb7be

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