Malicious PDF — malware analysis report

Static analysis result for SHA-256 398d88a27c717e99…

MALICIOUS

PDF

68.9 KB Created: 2021-01-09 17:10:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 78125058062fbd349c38c5c5550a2217 SHA-1: e638debcffa8f40ba00206e3ca8c656a996d37d3 SHA-256: 398d88a27c717e994ffc1a20e3bf4c8e02ef5a1998fff0dd2b215746dcffee7c
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a malicious redirector link disguised as a download for an Android TV APK. The document body, though heavily obfuscated, suggests a lure related to software downloads. The presence of a critical heuristic for malicious redirector links and ClamAV detection strongly indicates a phishing attempt designed to trick users into downloading further malicious content.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://gettraff.ru/aws?utm_term=stalkertv+for+android+tv+apk In PDF document text
    • https://static.s123-cdn-static.com/uploads/4417535/normal_5fe5736b23886.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/najobidewematexokob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387920/normal_5f91d58d94358.pdfIn PDF document text
    • https://bewimowijukoja.weebly.com/uploads/1/3/4/5/134584545/50dd36ba84aa4ce.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/hfWYhaR/carson_wentz_wife_instagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404523/normal_5f920401f1ce3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478968/normal_5fcf92ac42204.pdfIn PDF document text
    • https://xisedemagi.weebly.com/uploads/1/3/2/6/132681548/cec264eb8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502567/normal_5fcda33561964.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/jegfif1/sepumapitumapa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404502/normal_5f952381e3018.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/pogolo/58986645503.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/81918392716.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_off0000cfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB6 5084 bytes
SHA-256: f92f45cee91c72f2dc6d187ba726a60aca6a7111ad9d72961070f4f188beb8af
font_01_sfnt_off0000e11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11A 11020 bytes
SHA-256: 63af390a260e0ad2e68b440c9b1dc22d72f27ea8cd4634c7e1ee0a203e04c78d

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