Malicious PDF — malware analysis report

Static analysis result for SHA-256 16109ac1a31f6197…

MALICIOUS

PDF

70.0 KB Created: 2021-02-23 20:52:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b53f406ce9da2e61a799022faea383f6 SHA-1: b649e66daf034aaa0f8fb8df4086a0df447ffea8 SHA-256: 16109ac1a31f6197cfede84336630ed76e94d5acfa1b6341778b7449b50ecc6b
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/wix?keyword=cryptic+quiz+answer+key+d-8 PDF link annotation
    • https://pabixiwirixe.weebly.com/uploads/1/3/1/0/131071256/bedamonudupaxex-relemumuva-taxeriwap.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/didDXS9/sepiv.pdfIn PDF document text
    • https://cdn.sqhk.co/derepinejabi/4gjpudS/69706022155.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413456/normal_6003917d1ce4a.pdfIn PDF document text
    • http://wipalogazagak.22web.org/nuxonopusubebolil.pdfIn PDF document text
    • https://vufumepuzatine.weebly.com/uploads/1/3/5/3/135335191/7215329.pdfIn PDF document text
    • https://boriduleloson.weebly.com/uploads/1/3/4/0/134012687/bexuwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424689/normal_601799e191027.pdfIn PDF document text
    • https://cdn.sqhk.co/tumakakebi/dGJNjJw/napisag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426955/normal_5ff52bd39c67c.pdfIn PDF document text
    • https://jefiwoso.weebly.com/uploads/1/3/5/9/135996081/f50442d0.pdfIn PDF document text
    • https://cdn.sqhk.co/wotirixa/hh43P7U/lufthansa_flights_from_london_city_airport_to_frankfurt.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/1jfhEQ8/swordigo_great_caves_four_exits.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498882/normal_5ff618e64c5db.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fiwarirekagugen.epizy.com/you_cam_perfect_camera_free.pdfIn PDF document text
    • http://ruzuzis.rf.gd/putiw.pdfIn PDF document text
    • http://madukavinoxonal.epizy.com/26418128712.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_off0000d484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD484 5600 bytes
SHA-256: d23187f07e83ca727c4c34b12eb7d878689a46a253cde5c628b8e4fb7f7c8f35
font_01_sfnt_off0000e7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C8 10244 bytes
SHA-256: aca622017fd93b26dace43f2ea821886916095b28c7e6da8af4f6945db67c06d

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