Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd28f1684fbab95a…

MALICIOUS

PDF

74.8 KB Created: 2021-02-20 03:26:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b415a2921a9aa89ed2c41071b1154157 SHA-1: e64f605081efebd39d198634d48f95468a3c60fb SHA-256: bd28f1684fbab95a51ead5f39a58d879e93f9ba8650586c96e4ad68b405644ad
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/123?utm_term=madness+combat+project+nexus+2+release+date In PDF document text
    • https://zaxizibu.weebly.com/uploads/1/3/4/6/134672664/dafudetunusowi-vowakisemevi-lerebiri-neluzexot.pdfIn PDF document text
    • https://cdn.sqhk.co/panafilaputu/uGigYhe/the_rock_theme_song_ringtone_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zanudiwageg/75mfhjR/project_makeover_uf.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/iiiigg3/ants_on_a_log.pdfIn PDF document text
    • http://vegemisabuxum.22web.org/zarathustra_avesta.pdfIn PDF document text
    • https://cdn.sqhk.co/revinoxu/6gffr8x/organic_gardening_moon_planting_calendar.pdfIn PDF document text
    • https://pivamuwonojazop.weebly.com/uploads/1/3/0/9/130969183/870629.pdfIn PDF document text
    • http://stonersfranchise.com/risk_analysis_methods_journalwyvdx.pdfIn PDF document text
    • https://polerobozugewif.weebly.com/uploads/1/3/4/3/134344868/1680104.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/idgfJid/gisubov.pdfIn PDF document text
    • https://wavikifetin.weebly.com/uploads/1/3/4/9/134901048/jowodimaxugixeluz.pdfIn PDF document text
    • https://fekodajitor.weebly.com/uploads/1/3/0/8/130874258/13b3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pavulavusutiki.rf.gd/liftmaster_keypad_troubleshooting_guide.pdfIn PDF document text
    • http://kezaforow.epizy.com/chiari_like_malformation_and_syringomyelia.pdfIn PDF document text
    • http://tesitanine.rf.gd/sony_ps4_emulator_apk.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_off0000e599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE599 5640 bytes
SHA-256: 3b131ceb0d4231c0b354df472b0fc3642c4dba7bbb131ed3f1e312e65ebc9605
font_01_sfnt_off0000f8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C2 11052 bytes
SHA-256: 874f2dcb502d02462226047ca19d2288237016678ca79b07b16f6f6fb693bd82

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