Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba740becae23d89…

MALICIOUS

PDF

47.7 KB Created: 2020-10-09 20:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cf7bfbcd46bb46aeb6c399bbeb32e1d8 SHA-1: 769ada3b8996d5409bb8c9049e281e49a7fe2cc0 SHA-256: bba740becae23d8982008810647125cf0c80488bd08acdeb8c7399315abd7071
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/strik?keyword=the+art+of+the+story+daniel+halpern+pdf In PDF document text
    • http://mojebimif.gvjhslibrary.org/uploads/1/3/0/7/130738591/ae93c169660d2b.pdfIn PDF document text
    • http://wudoxupu.calgaryswsj.com/uploads/1/3/1/4/131407226/2292246.pdfIn PDF document text
    • http://sewiguka.roydesignedthat.com/uploads/1/3/1/4/131437089/41970c884.pdfIn PDF document text
    • http://vunabelov.springfieldempowerment.org/uploads/1/3/0/9/130969600/bokejozat.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://cdn.shopify.com/s/files/1/0428/4956/6886/files/lesivobesofuvuvivezujawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6393/5129/files/fresh_air_fund_virtual_camp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7633/9862/files/wotozexewawezev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8008/0801/files/vaxifalewopisijadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0013/0465/files/kotinovogeziwekavaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcc801e8-c0d2-41d6-9acc-22081642a3c8/vakonaxojizolukisuzovujep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b3683a7-ef6d-46ee-81c0-f4037ffbd848/940372545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccce88a5-5f5c-4efb-8714-c9f3c925a383/zipaxafokeviliwowebap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4350/9656/files/spider_man_3_gwen_stacy_dance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/9573/8518/files/ludoxawovuvumapezobewesop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2083/1904/files/frog_dissection_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/saduduwejukuzanadu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCB 4968 bytes
SHA-256: cffc4895c9cd066abfe8dbdf05b87c7e99dd6498295de1cf79663af3864a6c64
font_01_sfnt_off000080af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80AF 10112 bytes
SHA-256: 511c63e0b5c4d572fcf096e09170a4fd923e2c3887781924689fae1b280cfb82
font_02_sfnt_off0000a338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA338 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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