Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8dcf88ef7c24374…

MALICIOUS

PDF

215.9 KB Created: 2021-04-15 09:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a96cc281365173226340a12684960a25 SHA-1: b3ef4264b2790bb27738cfe6f47b71ccae83bf24 SHA-256: f8dcf88ef7c2437493e4fa3011ef966b6ffd61c2014ac6093223ff1a9ad962a1
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'jumiwimov.ru', which is likely a phishing site. The PDF structure and embedded artifacts do not indicate any specific scripting language, but the presence of external URIs suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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://jumiwimov.ru/strik?utm_term=navy+dive+tables+app PDF link annotation
    • http://profmaster74.ru/scansnap_s1300i_driver_for_catalinafgrae.pdfIn PDF document text
    • https://cdn.sqhk.co/muzexeragod/9hchewL/tusomixiweg.pdfIn PDF document text
    • http://usesucre.pro/vimixu8fn8l.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/fSU4ggc/56976918083.pdfIn PDF document text
    • https://cdn.sqhk.co/pupumukisev/d6hhhcU/61292478929.pdfIn PDF document text
    • https://cdn.sqhk.co/fofanibiv/kthipMt/15638515617.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/nji6icG/ara_pacis_augusto.pdfIn PDF document text
    • http://solhq.xyz/33327488879e924k.pdfIn PDF document text
    • https://cdn.sqhk.co/fusifanux/eOGStje/wuzegedewus.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/vgWFieL/telegram_sticker_in_whatsapp_importieren.pdfIn PDF document text
    • http://itprod.space/what_does_the_12th_day_of_christmas_meanxwhc4.pdfIn PDF document text
    • http://spiritstudio.ru/ridikevuvufonuduwezesoxefi46u.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/libeganot/matuxuxesexoxod.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/kaspersky_antivirus_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f03558d3-374e-4aca-8460-3986fac82509/farewell_my_lovely_pll.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/new_action_game_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/niferetokuweduvibovifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e997f13-cf1c-49be-a8d7-e546f94e5f65/41609772759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b92a91e0-2e26-43cd-a13f-37e3b11d39ba/97763361627.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/12673062192.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/excel_vba_file_from_sharepoint.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_off0003186b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3186B 5128 bytes
SHA-256: 1f0fdc0df0b3ead15282e04042de272cb4c1cf3423cabcd2f4ef275942e03487
font_01_sfnt_off000329fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x329FC 11412 bytes
SHA-256: b66d4206b9f65da4b7031a86ac6b28238ee9272cac74fcc81324e6e1d0404a88

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