Malicious PDF — malware analysis report

Static analysis result for SHA-256 dacf12ddf9a3712f…

MALICIOUS

PDF

80.4 KB Created: 2021-03-15 15:37:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d8d8fe4d460979deb3ac378ac3532e6a SHA-1: 70fc4632c75b1e3e102452065511b6151c24565e SHA-256: dacf12ddf9a3712f8a96c23f554ed1dd9841e5505438cdda516dd9c71a5cbddc
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 0.9996

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://yafferge.ru/wix?keyword=roblox+hoodie+template+transparent In PDF document text
    • https://cdn.sqhk.co/vefutifeves/Jjjgh0W/goat_simulator_payday_free_download_android_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449406/normal_5fc72f7101ba4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466367/normal_5ff1e59adf0e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448731/normal_5fec34393f7b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374533/normal_5ff223a072402.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_601dba4340209.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454575/normal_5fe089d29715c.pdfIn PDF document text
    • https://cdn.sqhk.co/satovepato/9jdRjjJ/fuji_instax_mini_9_camera_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393790/normal_5fe9dad642ca1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407664/normal_6035659aac8d8.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/jjlb5je/lasirelumiwakopibuz.pdfIn PDF document text
    • https://cdn.sqhk.co/torixugajo/heLghk7/dunudijagikexagixadaken.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/82b0e3d7-5315-44f8-baab-f1a92892a906/luzaralelodovijovor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d1b7d92-cb28-46f3-90c9-c233b16b0c1b/ge_advantium_120_door_latch_repair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abaf57c3-a149-4107-b85a-6de5f96afe3e/how_to_write_an_equation_for_a_trend_line_in_slope-intercept_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bcef00b-7cc7-4d3e-9ef3-9879f7a64376/jersey_mikes_giant_philly_cheesesteak_calories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3095104-edca-4339-b381-72c4311984b7/simple_and_compound_interest_problem_with_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67b90944-58f2-4cba-9757-5f944dc1d386/compare_greek_and_roman_theatre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b3f04e2-d0f0-4331-a1ca-c9f18361b0c7/satipatthana_sutta_analayo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc611d78-69b0-4a88-91ab-8e33307dd006/telavak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2843e1e-8de2-4255-a9af-c25f976b6f8d/petewinulotebax.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_off0000ef62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF62 5416 bytes
SHA-256: 167e8742a3f6def8bca1501201c87cac150df7f39bbbf18fcce79a0fce06fe3a
font_01_sfnt_off0001018f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018F 2504 bytes
SHA-256: bda46a189ab5ca82e9a2dfbdd44eacc5857f8d08cd207523bdafa5b6a969d3e3
font_02_sfnt_off00010c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C72 11764 bytes
SHA-256: caa8f3bdf4a28436b5117eec37549435d8cf4c6b1cb0f0b8bab870e144e02451

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