Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e2d0e68b3ff3af…

MALICIOUS

PDF

37.6 KB Created: 2020-11-07 08:03:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f64cfd664aae6e60aca0712b1f702916 SHA-1: ddcbfdc18f120e781eddc8f04480cb72bdc837c0 SHA-256: 16e2d0e68b3ff3af5da099c8310cea686686a45a4bb777feab18c74802f5ff8a
64 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 0.9989

Heuristics 3

  • 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
  • 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://traffine.ru/aws?keyword=graphing+reciprocal+functions+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405420/normal_5f9774e916a2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473632/normal_5fa53bb12a4ff.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/1045037.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421940/normal_5f9e5066596ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379231/normal_5f9ef9bb4e17a.pdfIn PDF document text
    • https://sosegesidor.weebly.com/uploads/1/3/4/4/134465043/taruwodebaro_dasoroj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426941/normal_5f9a2b508b9ac.pdfIn PDF document text
    • https://panasijizikefiz.weebly.com/uploads/1/3/4/4/134446590/f4748bd9.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/4513891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377381/normal_5f8a7e850d991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383170/normal_5f8e70aebc29a.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/04609804.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://givolajokofe.files.wordpress.com/2020/11/japatewajaliwififu.pdfIn PDF document text
    • https://pafegum.files.wordpress.com/2020/11/xumakosokidazok.pdfIn PDF document text
    • https://vulijafav.files.wordpress.com/2020/11/repewibaros.pdfIn 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_off00006604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6604 2856 bytes
SHA-256: a82526623dddcad496c92dd9fe7e2013d4de9b17122fe26d6652383d067ccae4
font_01_sfnt_off0000701e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x701E 5484 bytes
SHA-256: f376089675460be6c8e0e0696465578e2f0c90d9687e8b522ee81d658337d6ae

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