Malicious PDF — malware analysis report

Static analysis result for SHA-256 646183b2be621734…

MALICIOUS

PDF

65.0 KB Created: 2021-02-20 16:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: dd32473c4038ba63efbff47480e34239 SHA-1: 357a759122cf1a158ab5283d6633fc82bf6a01a8 SHA-256: 646183b2be621734c28aa50048f4ab4f6c9542f19aeff15a869de230af57ee02
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=go+math+second+grade+chapter+11 In PDF document text
    • http://rabiveronoxo.22web.org/23418816347.pdfIn PDF document text
    • http://sosunimepewe.22web.org/android_auto_mirror_senza_root.pdfIn PDF document text
    • https://cdn.sqhk.co/fanoxozowupe/idHihhj/68042033738.pdfIn PDF document text
    • https://nubajegi.weebly.com/uploads/1/3/0/8/130814178/9786148.pdfIn PDF document text
    • https://rekasefuwe.weebly.com/uploads/1/3/0/9/130969231/38739725213d08.pdfIn PDF document text
    • http://wimixolumow.iblogger.org/wifiwijuwituzomob.pdfIn PDF document text
    • https://lakofanagobogan.weebly.com/uploads/1/3/5/3/135386994/8779073.pdfIn PDF document text
    • https://simokatojerosu.weebly.com/uploads/1/3/0/8/130874490/deluwasatuvazuretofa.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/Cgdhfii/stack_overflow_java_error.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/geEibwU/ocean_survival_ultimate_simulator_apk.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/piwanisaj/cervical_cancer_screening_uptake.pdfIn PDF document text
    • http://repibikapowa.epizy.com/19544358500.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/48122601449.pdfIn PDF document text
    • http://kexafobe.rf.gd/annual_marketing_budget_template._using.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/ziduwibe.pdfIn PDF document text
    • http://wulitebajanuba.rf.gd/furaruvinexuzo.pdfIn PDF document text
    • http://bepapogijarepub.rf.gd/free_website_templates_for_designers.pdfIn PDF document text
    • http://dizakopalelur.epizy.com/jasperreport_javabean_datasource_example.pdfIn PDF document text
    • http://vumavoralamo.rf.gd/archicad_21_mac_crack.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_off0000c2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E3 5540 bytes
SHA-256: c9c373d4021d81ccc242caa0e0f21fdf58f631e76c18e2a1dceba1240e461ead
font_01_sfnt_off0000d590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD590 9776 bytes
SHA-256: b1fde76a6e54d8528e5a510acda17d7c71be83b5fd6cbf34bb96f3678a011b17