Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab726a5a15007864…

MALICIOUS

PDF

67.3 KB Created: 2021-02-12 19:36:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7503c69b1d29951842a4c85f9fadd1a8 SHA-1: d53928d287fb3b624dc29792684398fd0f1a1cfb SHA-256: ab726a5a1500786471cf77e2edacfbff73b08010d1338d94e4bb0d03dfbdd1cd
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yafferge.ru/wix?keyword=possum+hollow+bore+guide+%25234 In PDF document text
    • https://cdn.sqhk.co/fogibadeku/hjjdYjj/xovato.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/hfPLhfA/35804917975.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/hchhghD/pulse_oximeter_walmart_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/vozumolajaw/jEKghie/make_ice_cream_without_half_and_half.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484834/normal_5fd1ef8b536cb.pdfIn PDF document text
    • https://cdn.sqhk.co/gevajoke/iidif9l/man_down_rihanna_roblox_id.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/2iTCz1p/monster_hunter_world_mods_xbox.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/Y5U1Uii/64875134672.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/ibjdjgm/pro_lightroom_tips_to_learn_a_new_language.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/ifhjCqQ/linking_verbs_worksheet_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5fd6241c29b22.pdfIn PDF document text
    • https://cdn.sqhk.co/xewimoziwuvo/id6qy4t/pianistas_famosos_clasicos_youtube.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476421/normal_5fe28f5bec612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501383/normal_6024b828135c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446497/normal_5ff139c05af93.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC827 5260 bytes
SHA-256: a2dd14e66273c8206fbd8f2748dd930e0c433c20d3691399a40af39059660f55
font_01_sfnt_off0000d9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EE 11016 bytes
SHA-256: dd266707f3cabeee79edcc11f0e023482efa9f5d26ac4fef016a6a5f39bac4b6