Malicious PDF — malware analysis report

Static analysis result for SHA-256 76166a127ad385a4…

MALICIOUS

PDF

72.0 KB Created: 2021-02-17 05:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f4f6155017dc942c421fbcabf72a0ca7 SHA-1: 04e883254d5e3c01086a996b8ccbc8f3d6b397bf SHA-256: 76166a127ad385a4ebba7a94a0ebbb5a581d5306d85d3c2697d0a7673a927baf
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/wix?keyword=monkey+bridge+athens+tx In PDF document text
    • https://static.s123-cdn-static.com/uploads/4411503/normal_5fcb47b50a991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_6021aab2109cb.pdfIn PDF document text
    • https://vojidejera.weebly.com/uploads/1/3/2/6/132695434/pebeze.pdfIn PDF document text
    • https://dataremidesop.weebly.com/uploads/1/3/4/6/134697992/8776809.pdfIn PDF document text
    • https://gezivotad.weebly.com/uploads/1/3/5/9/135963035/9033231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483587/normal_6011b874dfeaf.pdfIn PDF document text
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/xetojumof-romuja-wuwona.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/qjfjiDI/android_oyun_club_dragon_robot_2.pdfIn PDF document text
    • https://vizejuvevu.weebly.com/uploads/1/3/2/6/132681979/kilut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5fe6cd5c8c572.pdfIn PDF document text
    • https://cdn.sqhk.co/bixatavafut/uigpjf1/red_alert_transformers_cybertron.pdfIn PDF document text
    • https://cdn.sqhk.co/pojuzijix/hhIcsHb/phet_simulation_projectile_motion_worksheet_answer_key.pdfIn PDF document text
    • https://novunafa.weebly.com/uploads/1/3/1/3/131379228/wurodaxujama.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/sazomo/vidmate_apps_install_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/hssc_clerk_answer_key_22_sep_evening.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/zitowuviduzofujujaxizedaz.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/remugeluwinenevosepasexid.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/quadrilateral_interior_angles_worksheet.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_off0000ddee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEE 5436 bytes
SHA-256: 5b933d826e65c1b403d33d9a59d0711ec9e80a296a5a9b82099295c9898d60a9
font_01_sfnt_off0000f078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF078 10100 bytes
SHA-256: 0ab96f2024c228f12b6ac2846b1458c332254096c3978496ba5438b8e07cb21b