Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d1a2c7a7c70a573…

MALICIOUS

PDF

47.2 KB Created: 2020-10-09 22:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8969e6d387049c4290bdc8281a8f69da SHA-1: 0042072e262c6b38f92437147d9981a96ae69680 SHA-256: 5d1a2c7a7c70a57385d22f27ca74658d06106f1c4850a4293077c49693c7f086
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://cctraff.ru/strik?keyword=juegos+de+matematicas+para+secundaria+online In PDF document text
    • https://site-1036824.mozfiles.com/files/1036824/47930112431.pdfIn PDF document text
    • https://site-1043491.mozfiles.com/files/1043491/sajotido.pdfIn PDF document text
    • https://site-1042821.mozfiles.com/files/1042821/balixu.pdfIn PDF document text
    • https://site-1037839.mozfiles.com/files/1037839/59601037027.pdfIn PDF document text
    • https://site-1036907.mozfiles.com/files/1036907/wogozedopemurixezotamofem.pdfIn PDF document text
    • https://site-1041198.mozfiles.com/files/1041198/24038930240.pdfIn PDF document text
    • https://site-1045398.mozfiles.com/files/1045398/ledod.pdfIn PDF document text
    • https://site-1037180.mozfiles.com/files/1037180/37969428701.pdfIn PDF document text
    • http://xipaxab.uncommongroundsmobilecafe.com/uploads/1/3/2/6/132696212/zodaleretilulekilume.pdfIn PDF document text
    • http://files.reina76artist.com/uploads/1/3/1/0/131069886/1342873.pdfIn PDF document text
    • http://files.eaadventures.com/uploads/1/3/1/4/131407029/vakojonafikamamajuj.pdfIn PDF document text
    • http://files.citylimitswestern.com/uploads/1/3/1/4/131406892/kevinobewov-bajanolapopaw-judigituz-binefiwi.pdfIn PDF document text
    • http://www.math-salamanders.comIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c14f4fe6-bae6-491c-a025-0ccb7adc0073/pebujupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dac14d0-286c-476a-96d0-219443c6d135/52330008080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06578b9a-0c11-48a8-87c9-5dd65e22ecef/2144076389.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_off000069a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A2 5264 bytes
SHA-256: 066e570ace0ccebb4b0f4b04caaf738e15a146932c26b03aacb8d03356dffb2d
font_01_sfnt_off00007b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B63 11148 bytes
SHA-256: 327aa3cb2dd28f2330aa327e8b578ed144d60e10e141c16b423af013203d937d
font_02_sfnt_off00009f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F80 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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