Malicious PDF — malware analysis report

Static analysis result for SHA-256 18961a5668a73559…

MALICIOUS

PDF

46.2 KB Created: 2020-10-31 17:18:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b4f7f4cde604d27909c3d0208dbe216b SHA-1: d9ce986daed3f0cfff25a1c8c4378884617162d5 SHA-256: 18961a5668a73559373fc429a0dd5e863b423814034b17740aa539d73e5c5edb
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://gettraff.ru/strik?keyword=richmond+driving+range+lessons In PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/gubivufexanumozovuti.pdfIn PDF document text
    • https://mematuseb.weebly.com/uploads/1/3/4/5/134516495/xuzujimabuzon-gozudoxobuz-rozekusebig-levumokusiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424349/normal_5f9d6a6278615.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/henghuili-files/zutuxilat.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/carnatic_wars.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/mibanifexuxeximewezaj.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/13366004071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8691/1919/files/ponagijadesam.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/dofebotaforibafosimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2200/0543/files/components_of_forest_ecosystem.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/42243223510.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/cetoconazol_comprimido_bula.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/butow.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/kaneki_ken_cosplay_set.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6563 5128 bytes
SHA-256: 2e1213e52ccfeeeced84d55a25badfa29b37d37eadb2e5a80e19f246e1f1b538
font_01_sfnt_off0000769c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x769C 11492 bytes
SHA-256: 0de2d491ce35a36e7b74ef04068f48abc73e45646a3fabc81610a5581bebeef1
font_02_sfnt_off00009dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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