Malicious PDF — malware analysis report

Static analysis result for SHA-256 f673d1b9de078c02…

MALICIOUS

PDF

74.3 KB Created: 2021-02-21 21:21:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e148e239834883e5b88a3afad849a6ab SHA-1: 9dfef41e072100ebda74d0003074f9e590638ede SHA-256: f673d1b9de078c027dcf373bf0559794726d6077a1ae6dae6d1e8aca8b2861cb
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded JavaScript and a high-risk ML classification, indicating malicious intent. The embedded URL points to a domain associated with phishing or malware delivery, likely intended to trick the user into clicking it for a fake support issue. ClamAV also detected this as a phishing trojan.

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
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://druttle.ru/strik?utm_term=why+won%2527t+directv+remote+work PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416811/normal_6014a13ac906a.pdfIn PDF document text
    • https://cdn.sqhk.co/duditizonut/gAjfhd8/mineral_oil_enema_dose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451566/normal_6026c66ce9a90.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/gfxgg2V/93940756329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491436/normal_602e61192a7ce.pdfIn PDF document text
    • https://cdn.sqhk.co/suvezadamut/jegjjfK/rigukumijufavatumiri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487424/normal_600650c6d3c2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456999/normal_5ff0373f0d59d.pdfIn PDF document text
    • https://cdn.sqhk.co/dosojegomugu/sghY0wu/13982744052.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416150/normal_60084d6b5882d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449793/normal_5fef9a4c19a55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450864/normal_600726a6b633e.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/XjbHjVH/5564090643.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/lorifawuvawot/zavugidaruperetukufaz.pdfIn PDF document text
    • http://xobofob.rf.gd/putexiziwikoj.pdfIn PDF document text
    • http://lojarine.epizy.com/android_game_development_java_or_c.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_off0000e557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE557 5124 bytes
SHA-256: ba0ba563bf973d3b99a1ab0b6e450f577076a6978a158afee1171966ef348156
font_01_sfnt_off0000f6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C3 10992 bytes
SHA-256: 86c962e808052bf0d476f58f3b4c95622c6218d6a591cbeb131202e59985325f

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