Malicious PDF — malware analysis report

Static analysis result for SHA-256 725efd1c289eef59…

MALICIOUS

PDF

73.5 KB Created: 2021-02-19 06:20:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8a0e99fc45d126453bf1a2d62ca0b583 SHA-1: 18945bcaf4eea31d01de9fb7d99be455b7659896 SHA-256: 725efd1c289eef596393093341f2c790d178154db477c5b48569b8cbc4f2bbcf
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/123?utm_term=casio+g-shock+ga-1100-1a3 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5fd3a7f3b155f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408588/normal_5fdea91492eec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417314/normal_5ff86aa73700d.pdfIn PDF document text
    • http://vesibigezedenu.iblogger.org/oracle_database_12c_study_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482849/normal_60009bf229e24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409000/normal_5fcc2865d7f87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421354/normal_5ff47b6b4eac8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390642/normal_601592be35e5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453754/normal_5fd6d97630acd.pdfIn PDF document text
    • http://gusanod.22web.org/just_shapes_and_beats_crack.pdfIn PDF document text
    • http://noziwop.22web.org/bionaire_humidifier_w6_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaketolem.epizy.com/nezuvikitafezujeket.pdfIn PDF document text
    • http://nolepukopele.epizy.com/bokeh_effect_png_free.pdfIn PDF document text
    • http://gatakokuto.rf.gd/amsterdam_city_break_guide.pdfIn PDF document text
    • http://sajavisazoz.epizy.com/tetavafunaxodesewum.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_off0000e454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE454 5292 bytes
SHA-256: d9507474987f7cf4a5fa6959b97a8875ac8e9e7e82abe6ce28d8ae3f879a0b10
font_01_sfnt_off0000f65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65E 10276 bytes
SHA-256: 852ba84143af655c2444b45ef30e55afda6d5f9f6fa30ba817c921c73a90b791