Malicious PDF — malware analysis report

Static analysis result for SHA-256 537095954f26f23f…

MALICIOUS

PDF

50.8 KB Created: 2020-11-02 04:29:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 591279ded290779acd20494f032b9df2 SHA-1: 08eccfb01d2a3e447fd55ab7a55a1d26b7416f13 SHA-256: 537095954f26f23fe09c67eaad4f838a7ab28f169ed56bf23f0b081b64e0ec32
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://ttraff.cc/123?keyword=eid+in+2019+usa In PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/9133990.pdfIn PDF document text
    • https://gizarokidobibaw.weebly.com/uploads/1/3/4/3/134363860/pudemesigebof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_5f99ed28e62a3.pdfIn PDF document text
    • https://mitegasur.weebly.com/uploads/1/3/1/8/131871816/f420006b859f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417534/normal_5f9906dc9ccaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369143/normal_5f9e74271cf47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_5f9e8b28dce1e.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/d63b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405413/normal_5f9866249dd25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5f929f07229b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bezutu/54805486991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4038/6455/files/scammer_billing_format_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc90e8c7-f4fc-4d4a-bb30-4516a90723cc/nowevekogilejufazo.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/guwox.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_off000061eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61EB 3604 bytes
SHA-256: 27a09d27bdd35fddac65867282c3f202ca6dc73718b4fe5a69c871b68548ab08
font_01_sfnt_off00006e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E81 5128 bytes
SHA-256: b9cf7be41f30829c06d69c86a16e1f2d61f72a73c8526842efb3e70dd1d78703
font_02_sfnt_off00008002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8002 10772 bytes
SHA-256: 3931d1dedf500f53598e40bb9cfc4a46eb22319eed8dd2b4a358cc0c31032be1
font_03_sfnt_off0000a518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA518 17000 bytes
SHA-256: 30871d8a5a3da0cb8950b34b38e9620215a39b8f5cf0aafde9509104fdd7695b

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