Malicious PDF — malware analysis report

Static analysis result for SHA-256 10fc8eea407a04b7…

MALICIOUS

PDF

88.0 KB Created: 2021-02-06 14:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2aed4ca53a3029e87140727fbda97555 SHA-1: ff93f75dfee1dd859606af88df4bc57e391db6d3 SHA-256: 10fc8eea407a04b797b24413eb4c3d0e195ed3ea5bad821d56404a1f4a59c0cc
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL disguised as a search result for a Kindle app. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL points to a suspicious domain, suggesting it's part of a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/aws?utm_term=kindle+cloud+reader+android+app+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368492/normal_5fec463c32873.pdfIn PDF document text
    • http://reestr.site/puvunazovariruvuzisimuk47te.pdfIn PDF document text
    • https://cdn.sqhk.co/salaseli/jghhhiO/53813238671.pdfIn PDF document text
    • http://frasqen.online/kirolovixijej6l6h.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/gkNgihK/rigovepepakofedare.pdfIn PDF document text
    • http://myluckywin.site/bidozapejemafuperetobof80an2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384320/normal_5fdcf05ab973e.pdfIn PDF document text
    • http://korecos.ru/namejul1c05z.pdfIn PDF document text
    • http://setlyb.online/skins_on_netflix_season_4jwj2q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413969/normal_5fff3b2c13930.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/ggRgfhi/79755165372.pdfIn PDF document text
    • http://reduslim-eu.site/japesogefavdci2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490529/normal_5ffbb78e1be63.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/mizeteb/22745324240.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/63229592689.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E6 4920 bytes
SHA-256: c2c528dc5c97aa1d3419ec5099e0a9fafc08cb768f9886f97fdfa8c13b56b840
font_01_sfnt_off000118b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B1 10800 bytes
SHA-256: 3d684ebd76a53ef882ea16aa80671a8458b849d0ca7a4adb628b9ed3e3fcf9f1
font_02_sfnt_off00013e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E06 16108 bytes
SHA-256: c3d4801e109e08d211b0bcc3aa8a72f52b2e2cdc27e0c523e0ccf2f34819f209

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