Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b94f5d614d4f875…

MALICIOUS

PDF

35.0 KB Created: 2020-10-01 17:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 824857820ef961962c54e2cfa6237719 SHA-1: 33cfa5cf998e40753a25cfdeca797bb0ec18c67a SHA-256: 5b94f5d614d4f87500072fc5659a74f50bfb0017f1479ece7579cfd4098f5323
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/pify?keyword=deku+hero+costume+mask In PDF document text
    • https://site-1037268.mozfiles.com/files/1037268/jumiza.pdfIn PDF document text
    • https://site-1037135.mozfiles.com/files/1037135/42248996955.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/sebivaja.pdfIn PDF document text
    • https://site-1039132.mozfiles.com/files/1039132/loluwitupe.pdfIn PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/momogidasitomirutuvobowe.pdfIn PDF document text
    • http://bewuxemi.jewelerinthewoods.com/uploads/1/3/0/7/130776138/01fa720.pdfIn PDF document text
    • http://files.aerikvondenburg.com/uploads/1/3/1/1/131164157/nuwebesovunemo_botixegokoru_tukobujakopolud.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/604d4de8-f233-4c5f-8903-f32d0d8be077/xapokimitisufasizisoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0973c7d-cfc7-4840-9a08-1ed736aa409c/nipiwudikozali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2304/4255/files/meijer_distribution_center_michigan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1523/2921/files/16143524235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8076/4571/files/xezafazabirebixatab.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_off00004cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CBF 5068 bytes
SHA-256: dfd61f8dbfb27658100de4b08e3865d9ea88d98cfbd2627d44ec691f23cdd34c
font_01_sfnt_off00005dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD5 9812 bytes
SHA-256: 3f1364162082e5a3b724444fc1c144cd1d6eaf35c0f98f841301f12f0178677a

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