Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b3d4919c562917…

MALICIOUS

PDF

75.0 KB Created: 2021-05-12 02:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 478a5da7d6a8354bbf371fa05a7c919a SHA-1: 5aebf329a65d303e902f9024cfe1a7568d18523b SHA-256: 86b3d4919c5629179b03ba35d9bfbedc57533ab96644bea4eadc88ab8691c88a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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://bologen.ru/strik?utm_term=my+cloud+home+duo+8tb+2-bay+personal+cloud PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452372/normal_601f710a22d31.pdfIn PDF document text
    • https://bobujiwa.weebly.com/uploads/1/3/1/0/131070874/gadetuxeneses_zumefog_bawowidil_dukipuxomesux.pdfIn PDF document text
    • https://letavozogat.weebly.com/uploads/1/3/5/9/135978758/4279322.pdfIn PDF document text
    • https://wotopegajoxife.weebly.com/uploads/1/3/4/0/134042499/dc7f771.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/nekevilegoderozuxgeypp.pdfIn PDF document text
    • http://robertferrell.net/valexenuwuxilalexohnh7x.pdfIn PDF document text
    • https://rijivujebevobog.weebly.com/uploads/1/3/4/4/134488471/lebeki.pdfIn PDF document text
    • https://varijiligedag.weebly.com/uploads/1/3/1/3/131383591/7866d039e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420761/normal_5fd9b8246fd58.pdfIn PDF document text
    • https://mitafomanamo.weebly.com/uploads/1/3/0/9/130969747/7212407.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460466/normal_5ff6752267607.pdfIn PDF document text
    • http://lofitner.buzz/nespresso_aeroccino_4_milk_frother_manualapl5u.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/vetamedisoz/bigezutikedadan.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/francis_report_meaning_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/70593478288.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/xedogabaxuvolivexukiz.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/danganronpa_v3_class_trial_3_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A2 5920 bytes
SHA-256: ac30cabd7b0469d30a99ecad8ecca5c002e39c45f6e4a67c3d9e2a97a6f74134
font_01_sfnt_off0000eba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA9 22812 bytes
SHA-256: 7ec223d2881335384f3b86229d27fa3c499bb89bdb77cd249a85986d24f59271

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