Malicious PDF — malware analysis report

Static analysis result for SHA-256 422dfb99123de7cd…

MALICIOUS

PDF

74.1 KB Created: 2021-02-26 12:20:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7316b95a22da9749e7272e40cccd2d61 SHA-1: 09dd4762ed352a77bb44c9c68e83d308e13d92af SHA-256: 422dfb99123de7cd6ac06d9f75785bc53cdcf4cb1dff764b78ffa05a3ed92fc7
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by the PDF_URI heuristic. The URL, 'https://gimoguvi.ru/strik?utm_term=1994+honda+accord+engine+oil+type', is likely used to redirect the user to a malicious site for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/strik?utm_term=1994+honda+accord+engine+oil+type PDF link annotation
    • https://sagisumofag.weebly.com/uploads/1/3/4/8/134882066/537d9bcf3c9.pdfIn PDF document text
    • http://turogitirimutax.22web.org/23597794736.pdfIn PDF document text
    • https://tesazovefikuk.weebly.com/uploads/1/3/1/4/131408970/739351.pdfIn PDF document text
    • http://ribupisid.22web.org/build_your_english_vocabulary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416493/normal_5fe2ca475e5fb.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/ql2jrhb/kigokeker.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485176/normal_5fcd9aa03b19c.pdfIn PDF document text
    • https://cdn.sqhk.co/dujagazatad/hjegcJ3/sprinkle_islands_full_apk_mod.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/wulagisi/50650157105.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/beginners_guide_to_the_share_market.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/dinixugitu.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/gourmet_restaurants_ielts_reading_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/13535054698.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_off0000e4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 5460 bytes
SHA-256: 9e6bbe2ec61b3e9364cbfe51d54853022becef5a19f8fb6adca3e4f183f82ef0
font_01_sfnt_off0000f797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF797 10492 bytes
SHA-256: 42e7ed1ad4839cc74ff195a7310ab287535becf00c0a8ddf319c81b55a67b33d