Malicious PDF — malware analysis report

Static analysis result for SHA-256 695b2f061cc2bcce…

MALICIOUS

PDF

69.9 KB Created: 2021-02-23 08:03:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d3cb40ea73ffdeb3674179a5787d9663 SHA-1: e1c54d2b59ee94928178a126f5f086083ad52d75 SHA-256: 695b2f061cc2bcce48e3070c209c8e5e577794f4da1f88f3a0300a35c944a737
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/wix?keyword=slaughterhouse+five+chapter+5+questions+and+answers In PDF document text
    • https://cdn.sqhk.co/fenazijeguk/tjbhgeL/74049790075.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469641/normal_5fdebfc330eda.pdfIn PDF document text
    • https://cdn.sqhk.co/belesobikezi/cjiibhg/super_star_fox_weekend_ebay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381101/normal_5fffdd029deed.pdfIn PDF document text
    • https://cdn.sqhk.co/bupabumo/ijchahi/cable_size_calculator_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/gJzhahg/jutapinufigesamuved.pdfIn PDF document text
    • https://gifetapajuloper.weebly.com/uploads/1/3/4/6/134682222/putufezuririw.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/mdopdhc/county_police_officer_salary_ohio.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/AvgfiaX/gugipefapupokifuneni.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/patilawasu/georgia_drivers_permit_test.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/beetalk_for_ios_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/45913047599.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/jay_z_black_album.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/nuvunozapikokozidada.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_off0000d321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD321 5924 bytes
SHA-256: fe3a77c061c2e9a0e3416c8e87176c55237d88863ccebf1be9aa2fe88d5d6d0c
font_01_sfnt_off0000e753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 10300 bytes
SHA-256: 4ac76b651acb6867c9d6964a43a6078d1aa4dbb323a843aef6e7c793d46d4f19

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