Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1910e4d7049fde…

MALICIOUS

PDF

71.2 KB Created: 2021-01-15 22:36:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0152dc25fa1ec6896f75d97a904a07e7 SHA-1: 267d0ba6e326fba840337197ba7655c411e73289 SHA-256: 2c1910e4d7049fde8767698738b1bc102051a860da2593ecb4706b26eb36a784
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, specifically identified as 'Pdf.Phishing.Trojan'. It contains an embedded URL pointing to a known malicious redirector, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'air fryer vegan brownies', suggesting a lure to entice clicks on the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://cctraff.ru/123?utm_term=air+fryer+vegan+brownies In PDF document text
    • https://cdn.sqhk.co/javeduner/fFthghb/ponugozepudotosereritiza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455907/normal_5feb4dfc617d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454541/normal_5fd1d1ab949c9.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/3765466.pdfIn PDF document text
    • https://guvolobojifo.weebly.com/uploads/1/3/4/7/134733869/femewi_xojaxulit_roguzib_fezav.pdfIn PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/4259907.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366335/normal_5fde216c3153b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426408/normal_5fa5c105a529f.pdfIn PDF document text
    • https://cdn.sqhk.co/jasowipe/g9f8gee/ultimate_goal_synonyms_list.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/YJIoEhd/tower_defence_king_mod_apk_android_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379234/normal_5f93723042a90.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/zukukelejurotef/59820810743.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/accident_reporting_center.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/72730799534.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_off0000d96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96A 5284 bytes
SHA-256: f5ab536672af51847b609e0a85710ba5fdc73a12bc4729e3b6f547f9ec79e798
font_01_sfnt_off0000eb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9C 10884 bytes
SHA-256: bc4f7911726b8c7536cca7564f8c73ff588d6b5afb8f87f9ed67618a394bd3ab

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