Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec57c5fb8cd3ec81…

MALICIOUS

PDF

84.6 KB Created: 2021-02-09 22:58:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: da2e29f480cbf034874e1e8d47ce81c6 SHA-1: 52b0208a783a4d3bd637eae515fd8e4c0580c1b7 SHA-256: ec57c5fb8cd3ec818d6f4b468ddc479bdd0daf81f7cf08afc3f4f5368fdd7b5d
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/wb?keyword=cold%20air%20intake%20performance In PDF document text
    • https://static.s123-cdn-static.com/uploads/4369630/normal_5fe0198a4749a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529780/normal_6012b14f17ce9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501804/normal_6017957c43ace.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413967/normal_6008b6e0ee9bb.pdfIn PDF document text
    • https://cdn.sqhk.co/tuledapozato/aghqNFr/the_outbreak_movie_gamer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468819/normal_60069e162e69b.pdfIn PDF document text
    • http://deflecfcvy.best/meters_to_feet_conversion_calculator_free7p9tk.pdfIn PDF document text
    • http://hookup153.space/terraria_thorium_classeskmju2.pdfIn PDF document text
    • http://arenaprobet.com/793963017360wksn.pdfIn PDF document text
    • https://cdn.sqhk.co/xiteduva/ggiasig/8333221201.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453551/normal_5fe43d1a73dbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483870/normal_5fcac89044e96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373999/normal_5ff3f9f31f223.pdfIn PDF document text
    • https://cdn.sqhk.co/kizewetete/gdNhcji/idol_champ_show_champion_fandom_kpop_idol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461791/normal_5fee82a17fd2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392207/normal_5fe28dd1ae068.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376375/normal_5fdeca158cd39.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puzegekizizovin.epizy.com/descriptive_essay_outline_template.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_off00010e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E61 5092 bytes
SHA-256: 7b5bf3b61559a13c9ef3e59773e2fb23f107a8d5cd3f00c6f7bb2ef0f044fb27
font_01_sfnt_off00011f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9F 11112 bytes
SHA-256: 29bd5ec30adcc094cbedc1a87cd9deb4e1ed9f66c825cb6e2da5f8b0910823ae

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