Malicious PDF — malware analysis report

Static analysis result for SHA-256 788d6fbaca71f913…

MALICIOUS

PDF

37.5 KB Created: 2020-11-06 03:23:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-18
MD5: 03590c81e9034ef723d650457f0559b7 SHA-1: a898f180e8bae35d8f28fe5e82aef15ff5c58bf9 SHA-256: 788d6fbaca71f9132ad8f266dae2f64fd2d5bacde0e7a9eeac6d51f401bc6de1
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://traffking.ru/aws?keyword=paloma+water+heater+dealers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5f911569762ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_5f962943abc3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_5f89775a4cf16.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/e49779b40989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425915/normal_5fa2f018cf2f3.pdfIn PDF document text
    • https://gugozakeku.weebly.com/uploads/1/3/4/5/134588211/gakagudib-garigusokoka-wivenakopufeda.pdfIn PDF document text
    • https://nepagezefo.weebly.com/uploads/1/3/4/4/134472827/8676051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387562/normal_5fa43b6209511.pdfIn PDF document text
    • https://wazajodowefode.weebly.com/uploads/1/3/4/0/134017502/adddce5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414334/normal_5fa4a24931739.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/jomijutapefi.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/mefovu/rafeseradefuxebin.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/iit_jam_mathematics_syllabus_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4446/0951/files/2015_diamond_infinite_edge_pro_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8109/7904/files/22_clues_cheats_level_20.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_off000055e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55E9 5160 bytes
SHA-256: 506ce70a773646fe785e0d2d85031ad4d93774ccc183542c1cb585dd93990598
font_01_sfnt_off00006753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6753 9940 bytes
SHA-256: 0b2c88777a0622b3e45cc893e72299ea208ea210c75081e5cc14d2e632cfe610

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