Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9f1294d7c922fb…

MALICIOUS

PDF

42.0 KB Created: 2020-11-07 04:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 1da05b044e0fdc37340bc68050ed6cae SHA-1: 22b2c7f39d81788789708cf9f4708b48780b8481 SHA-256: be9f1294d7c922fbe071062fbb1974a91a5f3736390dae8f77a85a63003c3090
134 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffine.ru/123?keyword=desktop+computers+hd In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_5f93c8fb83ebb.pdfIn PDF document text
    • https://zokejiwiperasuk.weebly.com/uploads/1/3/4/6/134668939/kobaworer_guputu_ginekudogujekob_borakowupojexoz.pdfIn PDF document text
    • https://jegupifak.weebly.com/uploads/1/3/4/0/134018348/linipavixa_nerilaviwajekix_xekotagobowok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390051/normal_5f90bcb6f0acd.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/1e1d71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5f8a8c7cd153e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423728/normal_5f9c0c6cc1f94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5f89232f745a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f888406ce9b1.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/rebolisazupegim.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/farowug/33167992054.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/sfsu_summer_2019_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/50092394923.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_off0000650d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650D 5136 bytes
SHA-256: b37aca69f42455954b839d78b8de5545ab811519a212a8cf5bf8d3d4fbd18392
font_01_sfnt_off00007663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7663 10752 bytes
SHA-256: 16ab8bafafd48a8ef0061c44021e0d28583f31d4591b1d4ea329e3810e4d76ab