Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38a0bc0a175fdd4…

MALICIOUS

PDF

42.4 KB Created: 2020-10-19 04:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0d6a81fc57eb9b59d24aa80e3cf5c1d4 SHA-1: 16093486516f2287800886baea7864cbb67451e6 SHA-256: a38a0bc0a175fdd41d53f6f548fd65b0a23972e84a264091a230b1b5867d43c3
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/strik?keyword=el+yunque+werevertumorro+golpeadora In PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/3592415.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/5254704.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/dixubu.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/5dacd.pdfIn PDF document text
    • https://wemibevufiwoseb.weebly.com/uploads/1/3/0/8/130813314/2a2e4b6ae9e4ad6.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/528547.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/bitusajux.pdfIn PDF document text
    • https://zuxuzesis.weebly.com/uploads/1/3/1/4/131438019/jagiguwero_pinuzomubemo_tasulosimixamix_morux.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/jixidused.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/698c7f200.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/dewimiwivup.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/ba83da06bf1.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/wevefitojabiwozabof.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/22144ddf-92c7-404d-8802-641a8e49e86a/womimirizujerolew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03501edf-1f78-4dfe-8b19-ed214b0358d4/patomojudoputemanuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9032/2630/files/state_of_texas_drivers_license_audit_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3866/2807/files/lambretta_spanners_manual_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5289/8739/files/metaphor_and_simile_worksheets_grade_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/xigasobuvitobep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/dividing_integers_word_problems_worksheet_with_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4548/5725/files/converter_curriculo_para_online.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_off0000651a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651A 5436 bytes
SHA-256: 6330c36b762e054a64210355723c67e48b12545226a9a2ba0423117f85672a93
font_01_sfnt_off00007797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7797 11308 bytes
SHA-256: 5b7b6b30bc8001cc388b7998e6791aee6efddef8f1761100a9fe6a0b8bf07d2e

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