Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a839cb8acb4d7c…

MALICIOUS

PDF

67.8 KB Created: 2021-02-26 00:17:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e9f6881fe0948e227cc7ce5c5299683e SHA-1: 4633af51b1221b19737a37d33b92a663307b6cb3 SHA-256: 09a839cb8acb4d7c87140a4b224632fb19ceeb8047955cee34cbcec2cbf18488
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/award?keyword=how+to+use+haier+gas+range In PDF document text
    • https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/rapovogasaxe.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/our_god_reigns_chords_key_of_b.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/3behjCX/romantic_music_ringtone_download_2018.pdfIn PDF document text
    • http://wabowiwajej.iblogger.org/kawasaki_disease_guidelines_2015.pdfIn PDF document text
    • https://fijapirugonobi.weebly.com/uploads/1/3/4/3/134315317/04adf6d86.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pikubub.onlinewebshop.net/how_to_cook_rice_in_the_electric_pressure_cooker.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/assinatura_digital_creator.pdfIn PDF document text
    • http://soburuwukipo.epizy.com/wovupe.pdfIn PDF document text
    • http://zuvetimimu.rf.gd/rilokefagurepikuromo.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/rizafixokopinisuji.pdfIn PDF document text
    • http://femodizabofowu.epizy.com/ielts_reading_test.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_off0000cf8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8F 4968 bytes
SHA-256: 222cd9ea6408cbd49f8c8e19c118b46c7ac2caa9d1525482b1bbf2c2e93cb905
font_01_sfnt_off0000e082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE082 10004 bytes
SHA-256: 4b7979364463f0c6495907331cbda61ed1b708e1ca81b33fb36bd1777d372fa8