Malicious PDF — malware analysis report

Static analysis result for SHA-256 41946053d59d0b10…

MALICIOUS

PDF

41.9 KB Created: 2020-11-08 23:29:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8487fbcfd56035d6cb3bf564db58867e SHA-1: d64266d246455d966d573a8cd2085392b5166447 SHA-256: 41946053d59d0b101ec947cafd609a14c1989c3eb8bbff5276d14f1b5d237c4d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/123?keyword=familiar+of+zero+seasons+in+order In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388825/normal_5f8f38209877d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://guxijepolojo.files.wordpress.com/2020/11/fimomifegidawozumatikej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70b934b2-5112-406b-bf7d-3c28d5e0a1e2/nobezulaxiwimav.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/68257647781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/817ac62e-8b42-440d-8b5b-410e38a84e97/samsung_un65hu8550_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/indian_society_of_agronomy_books.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/dofus_guide_xp.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/walton_county_tax_assessor_monroe_ga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5fdccb-ac3e-45a8-8353-032ee9881765/tijewodatewedamonufobete.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/lanubeninazuxakixowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/000cba12-fc57-4180-b271-0110a00f8ee2/67391151082.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/holotropic_breathing_technique.pdfIn PDF document text
    • https://borivul.files.wordpress.com/2020/11/39154178052.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 6

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_off000065d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D3 5060 bytes
SHA-256: 260a8373f2f3317e525542329abf025e5d4304bac47a781853ac3fb87c76f774
font_01_sfnt_off000076f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F8 10396 bytes
SHA-256: 99aff43e095d7592851146c65ae2708b36344ceb2ebe4f9a7d4091e9d94d0c48

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