Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd8fbc6b2075a4c3…

MALICIOUS

PDF

72.4 KB Created: 2021-01-28 02:48:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1ff343b4ea462d5a7505bcb87ee6ac78 SHA-1: dd22be1f0e7ee5a939ba00aaf98d6f265345b3c2 SHA-256: fd8fbc6b2075a4c3e178ec08f52f4101eece073e4a432c6b4923804e5f312296
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/wb?keyword=alien%20shooter%20lost%20city%20mod In PDF document text
    • http://zizopeja.22web.org/62113258959.pdfIn PDF document text
    • https://cdn.sqhk.co/sabiwizi/7jjjhfD/human_resource_management_certificate.pdfIn PDF document text
    • https://cdn.sqhk.co/mosugukasiba/ghie7El/denaluxepone.pdfIn PDF document text
    • https://zowamuzifam.weebly.com/uploads/1/3/1/1/131163536/pumujapinuxa-zosozovipeguw-rumalanibur.pdfIn PDF document text
    • https://nebekateri.weebly.com/uploads/1/3/1/1/131164314/vobobi.pdfIn PDF document text
    • http://barurizex.iblogger.org/befunky_for_pc_free.pdfIn PDF document text
    • https://balolenitazir.weebly.com/uploads/1/3/1/0/131071159/4f5fe.pdfIn PDF document text
    • https://noribazab.weebly.com/uploads/1/3/1/8/131871745/wawuvevedi.pdfIn PDF document text
    • https://wexopusipomela.weebly.com/uploads/1/3/5/3/135313487/7926833.pdfIn PDF document text
    • https://cdn.sqhk.co/fofotixoz/xjjhaic/pathology_of_covid_19_cdc.pdfIn PDF document text
    • https://meputaxuxiku.weebly.com/uploads/1/3/5/3/135304120/9302995.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/gogunabones/nuvifab.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/jakutiv.pdfIn PDF document text
    • http://konugatevokaxot.epizy.com/pipaw.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/duxoxef.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_off0000df21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF21 5060 bytes
SHA-256: 35cd394ee7de56c3f1a295074985c54d84b73b77444d707082f51b93c9cbb493
font_01_sfnt_off0000f034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF034 10696 bytes
SHA-256: 36ad3a221b94bbd29695622e6f73aa94a415de33ec9dfe2f326c593921028f39

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