Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c493a212c226570…

MALICIOUS

PDF

61.6 KB Created: 2020-10-17 04:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 60d17ad73b160868e6b9a9f30d9a17b3 SHA-1: b394a14c9a2935d48dadd13d9c6f562410ca345f SHA-256: 4c493a212c226570328f015f05272785870e5481c76a00dc0fda8581c76b1cfd
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/123?keyword=%25D8%25AA%25D8%25AD%25D9%2585%25D9%258A%25D9%2584+%25D8%25BA%25D8%25B2%25D9%2588%25D8%25A9+%25D8%25A8%25D8%25AF%25D8%25B1+pdf In PDF document text
    • https://pitimonajavigo.weebly.com/uploads/1/3/1/3/131383860/gokalida-nujizufom-zezozimido-tawikizujej.pdfIn PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/kuxet_dejixulijufed_sirelole.pdfIn PDF document text
    • https://namunobuwuper.weebly.com/uploads/1/3/0/7/130776476/6208526.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/5358469.pdfIn PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/2915921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5f8a27545380e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_5f8a21e260d95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377401/normal_5f8a350e60624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f88ce31edb61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f87268786739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_5f8a3f563f633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f89115107f6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f875be759f9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5f8828b31ebc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f875fdbd1e44.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/1/0497/3704/0023/files/letilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6245/5200/files/career_cruising.sign_up.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6383/6323/files/73127192058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb83e513-6c00-40fb-b66d-e281bf58ae58/ranibenufapema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59bf5534-40a0-469f-82bb-056c5b90429c/8741076918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33721663-c194-4957-b127-89edf583502d/28473234088.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a1b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA1B9 30544 bytes
SHA-256: c9e0b8c79ced4f984269f5bf42d0b6ec43ba19e7d6667ffbbe30e6903acb3420
font_00_sfnt_off00005e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E05 3748 bytes
SHA-256: 22aa2d6203df31573d8fc59aa76d4bb86df2d82b49e182ce872973e26ffe5b82
font_01_sfnt_off00006a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9E 17460 bytes
SHA-256: fb6880a6baf94526104d8df30ab9e9ec2297b08bbca318124d0463ef23127b7f
font_02_sfnt_off000084a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A9 8464 bytes
SHA-256: 2b1a668b3010e52a90fdb9febdd1bd23c81f5246902d1dcb16278b56b72db991
font_04_sfnt_off0000d7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176