Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04872e4f568776f…

MALICIOUS

PDF

73.7 KB Created: 2021-01-17 11:56:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0518b41223b65d8eff4b032ae5499011 SHA-1: fbc64b39d30b2a5929ac93c5ee1953cc8896188e SHA-256: b04872e4f568776f00e17945fe91f92e99cc14c03b98c80e3245212901a0714e
156 Risk Score

Malware Insights

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

The PDF contains a link farm and multiple external URLs, suggesting a phishing or spamming campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffnew.ru/123?utm_term=iphone+5s+screen+replacement+tool+kit PDF link annotation
    • https://site-1176842.mozfiles.com/files/1176842/gafevul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5f8809856e35b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417137/normal_5feeda5041a61.pdfIn PDF document text
    • https://fekadoripegat.weebly.com/uploads/1/3/4/5/134592683/8541980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454995/normal_5fad47b327511.pdfIn PDF document text
    • https://cdn.sqhk.co/velujuvaxal/gdiguGY/dugijovezurebamonububu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408483/normal_5fa79b0a87d60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411921/normal_6000750dd8da2.pdfIn PDF document text
    • https://site-1167928.mozfiles.com/files/1167928/france_simulator_2_premium_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408340/normal_5fd81fef8e0b9.pdfIn PDF document text
    • https://site-1175316.mozfiles.com/files/1175316/androidx_support_library.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/hj6gidu/xikuninarizanadabanuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61B 5088 bytes
SHA-256: 8ada8e0990710d70a66d2608a240a8745402d155223a57492f16fde0a19ee494
font_01_sfnt_off0000e725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE725 10624 bytes
SHA-256: 459744feaa06d1916aba665f8f810a6ec857baa17a99efcab5456bb90ce7e2fb
font_02_sfnt_off00010b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B81 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.