Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db9ccd1a477ab42…

MALICIOUS

PDF

45.9 KB Created: 2020-10-26 00:54:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 2737682cce4f0b8ff49096470c9d0d03 SHA-1: fe72134273545523dae40a59fa07142abd38ea13 SHA-256: 3db9ccd1a477ab4200823a0b87349029310927c983599d6269c8e4ddd1095258
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://cctraff.ru/pify?keyword=trueman+biology+class+11+and+12+pdf In PDF document text
    • https://rimosuvifakub.weebly.com/uploads/1/3/4/3/134310068/cd982f66930f7c.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/6dcacf34f7bb.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/f3f426e4.pdfIn PDF document text
    • https://dajexave.weebly.com/uploads/1/3/4/3/134352807/ferusu.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/magobopizopito-fedekuvajigin.pdfIn PDF document text
    • https://giwakatunu.weebly.com/uploads/1/3/1/4/131437107/fitonumijebarovepiso.pdfIn PDF document text
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/1801338.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/zudoxazimepulige.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/70f77a9bf0ac1db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385434/normal_5f94f19a4dc86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409098/normal_5f93244788f4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402000/normal_5f94feb927d96.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/7495fb6b-7db3-42c3-8859-61ce4aedba79/3153940300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d659d2-ab62-4080-b6ed-9e95ac619f90/xadokunipavonijebategepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4312/5917/files/496954646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2931/8813/files/download_reader_for_pc_32_bit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1684/5469/files/small_intestine_cancer_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/kadirexajejak.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/bronfenbrenner_systems_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/guide_to_data_analysis_using_spss.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5178 5852 bytes
SHA-256: 17dd4b2b6ce7b22ad6092836a87195e4a441749856ffaded4fed0d5f64380227
font_01_sfnt_off00006548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6548 1748 bytes
SHA-256: a3fc0613295f94d0d193571187cb8228c806f0176742e1a4b04f3d3dd8990fd8
font_02_sfnt_off00006dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBF 11720 bytes
SHA-256: d14841bcc1cc16dcb449b16339b30637ed91d13e434d10f04f74dc5c30e3d32a
font_03_sfnt_off00009369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9369 16488 bytes
SHA-256: 021eaf6e245db5e9796d6b6553760bdf6420435298fcceecd052273e6f7cbf38

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