Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d2bc6f71bc54de…

MALICIOUS

PDF

44.3 KB Created: 2020-10-15 03:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 07ca97be29613259e54b0d0f0f2ebe15 SHA-1: b638ded863bcd9041f60e6123df734dd3f761c7e SHA-256: c6d2bc6f71bc54de1708028cb032467f36ccea0b26c28f787f5f5bf859452075
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://ggtraff.ru/strik?keyword=android+studio+problem+parsing+package In PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/98a531d6b1c.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/2115244.pdfIn PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/584ff28d2b5cfae.pdfIn PDF document text
    • https://site-1039636.mozfiles.com/files/1039636/fikafak.pdfIn PDF document text
    • https://site-1038468.mozfiles.com/files/1038468/tafesitowipokene.pdfIn PDF document text
    • https://site-1037246.mozfiles.com/files/1037246/64160762747.pdfIn PDF document text
    • https://site-1043169.mozfiles.com/files/1043169/75565745183.pdfIn PDF document text
    • https://site-1040764.mozfiles.com/files/1040764/99945318296.pdfIn PDF document text
    • https://site-1036779.mozfiles.com/files/1036779/vuwiwoxuxilud.pdfIn PDF document text
    • https://site-1038627.mozfiles.com/files/1038627/bufurepoxitetatuwuse.pdfIn PDF document text
    • https://site-1040399.mozfiles.com/files/1040399/tavitudotabodedu.pdfIn PDF document text
    • https://site-1041598.mozfiles.com/files/1041598/48130575703.pdfIn PDF document text
    • https://site-1039694.mozfiles.com/files/1039694/41407637265.pdfIn PDF document text
    • https://site-1038892.mozfiles.com/files/1038892/waxivilelegojejifesuka.pdfIn 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://cdn.shopify.com/s/files/1/0500/9915/9211/files/surviving_schizophrenia_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1485/6093/files/birthday_hindi_status_for_gf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9669/7749/files/kexuxuxulifotosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0837/9048/files/on_accident_or_by_accident_which_is_correct.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_off000061ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AC 5468 bytes
SHA-256: 24863051dc9338934e3194e4578da47450a834c506b2b5336bf1de182e63b84c
font_01_sfnt_off00007422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7422 9844 bytes
SHA-256: 21f3840091c7013c9c2f61e7a3c6acafc4d450688ee20435ecd55a664eb31dc1
font_02_sfnt_off000095d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95D2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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