Malicious PDF — malware analysis report

Static analysis result for SHA-256 971b732fe03f61a4…

MALICIOUS

PDF

71.7 KB Created: 2021-02-24 02:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 402e4727bf9fa1927fa9166f2a7f7690 SHA-1: e1f4cabe36113e3d4ad2ad78f3ed66f6c7d1e116 SHA-256: 971b732fe03f61a417e5987e478e35db82495bc4789a21cc0932c7fea85c9ae1
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/aws?utm_term=can+you+have+2+roku+remotes'. This URL is the primary indicator of malicious intent, suggesting the document is designed to lure users to a compromised site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/aws?utm_term=can+you+have+2+roku+remotes In PDF document text
    • http://gafowegane.iblogger.org/trane_xe90_fault_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/cjaOhce/oil_rig_wallpaper_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/XeichaE/red_rose_tattoo_behind_ear.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476595/normal_5fe867db32c07.pdfIn PDF document text
    • http://polfact.site/91849131511uvi7m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490250/normal_601dfa9369056.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/jfYHygf/dirasugamurizes.pdfIn PDF document text
    • https://cdn.sqhk.co/ritafase/ihiheif/rise_of_kingdoms_codes_october_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426828/normal_601f160aee753.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459922/normal_5fdd90c7b02f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fijoramobizedej.epizy.com/write_instructions_worksheets.pdfIn PDF document text
    • http://kileduf.epizy.com/vomixujufatadirakexoxod.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/visual_studio_2017_format_js_code.pdfIn PDF document text
    • http://bamusob.rf.gd/64578915084.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/formic_acid_to_treat_warts.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/brand_guide_mockup.pdfIn PDF document text
    • http://kopuperoki.epizy.com/39424499054.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/68697980510.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_off0000d9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AC 5156 bytes
SHA-256: d331e92f400e4b3bdd29ecd03ce89f02f11fede1437eecd66c09dfcb5fa2c17f
font_01_sfnt_off0000eb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB16 11424 bytes
SHA-256: 5e367f3e43f5f21b5ccd43d4fbc353ddffb8f5efe0a5206fec96c78bb9860fca

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