Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46b81b1953a21ea…

MALICIOUS

PDF

47.2 KB Created: 2020-10-29 02:48:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 5be8fbefbbd6e54edd54b04ba4b894b1 SHA-1: a597582271339f7e4fba7c192ba4992052b38853 SHA-256: b46b81b1953a21eac1ba973d157340dc7421fa7b660d9334f3e2b841e1e81b49
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://cctraff.ru/pify?keyword=letters+to+my+palestinian+neighbor+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384642/normal_5f9941b171256.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393186/normal_5f92f803a7c9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f8c108a00567.pdfIn PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/380c40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369919/normal_5f8f5600aed04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_5f951e200dd6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f8a725d70701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387229/normal_5f92b3914ffc7.pdfIn PDF document text
    • https://xozanazefozi.weebly.com/uploads/1/3/0/8/130874019/d2c201.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006b1d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006b1d.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000a0c7.bin)
    • https://cdn.shopify.com/s/files/1/0434/0586/9208/files/zofapeberejirexawur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/kosamufizofukoxujibogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9126/8262/files/51733932241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1152/2727/files/mohave_county_recorder_forms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7661/5837/files/34817935711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9929/4363/files/gowukekepojegulawuzokumuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3652/2149/files/98356311076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8477/3055/files/14045558334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9493/6226/files/88193433114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8637/1752/files/fosow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8087/0809/files/sexual_energy_transmutation_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8050/6773/files/forza_street_for_android_download.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 extracted file (font_00_sfnt_off00006b1d.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1D 5516 bytes
SHA-256: 4adc051c7aba83e55079265b072f9baa1d730644a488a7f083573e5df44d021a
font_01_sfnt_off00007dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC2 10260 bytes
SHA-256: 3332c096ed21bde25232c47bab1f481b909dfde1db6358f28712dc9045602df7
font_02_sfnt_off0000a0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0C7 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3