Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e826bcad4f9a53…

MALICIOUS

PDF

77.5 KB Created: 2021-03-04 07:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a265a87fc9e549f151835ce61f5d1e01 SHA-1: ea9e691da8b3a70d9f34a1e83c7cdd401518d500 SHA-256: 69e826bcad4f9a53a97b0eaf07df4fe2dac49f266db742438af1a8c4afb86889
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://kuzutuzo.ru/award?keyword=how+many+books+are+in+the+i+am+number+four+series', which is likely part of a phishing or redirection scheme. The document body, though heavily obfuscated, contains text related to a book series, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://kuzutuzo.ru/award?keyword=how+many+books+are+in+the+i+am+number+four+series PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450630/normal_6022062fa03bd.pdfIn PDF document text
    • http://zejenaxudemato.22web.org/caja_de_ritmo_roland_r8_mk2_precio.pdfIn PDF document text
    • http://civiliscmq.online/acer_g236hl_reviewschhd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486193/normal_6039cd295c088.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425238/normal_60261d12d2460.pdfIn PDF document text
    • http://lemixebu.22web.org/9500020258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473052/normal_603901bca20fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368777/normal_6005012672d6e.pdfIn PDF document text
    • https://cdn.sqhk.co/demanajinu/mjbhfgi/nebezovojoxuvigit.pdfIn PDF document text
    • http://neuroncraft.online/interview_questions_for_freshersy1vet.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/vudivuzakal/69463851061.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/koxojewumanukufet.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/2012_chevy_cruze_manual_mpg.pdfIn PDF document text
    • http://rutotonofawe.rf.gd/delorme_inreach_se_login.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/mybmtc_app_free.pdfIn PDF document text
    • http://rigitusavogu.epizy.com/mubujo.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/jupabasuwubakewagax.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_off0000f277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF277 5336 bytes
SHA-256: dc2900df23607c786a0be41b1bbb746070323b65912084076034bf8b20687ed7
font_01_sfnt_off00010488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10488 10624 bytes
SHA-256: 12fea0726c72bff54566141412d012a37bc80fd7e4cd5acd964e3371d3936117

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