Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb4ba65685055ab…

MALICIOUS

PDF

86.9 KB Created: 2021-04-05 14:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b67b308103e1a4068adbb33611427030 SHA-1: d6dcbfcbec3f16c87c637d7a257ee35ef704ad35 SHA-256: acb4ba65685055ab15b7b87ef6c3eaed0af4140425352df9dfa0bdd26fe11b31
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely a phishing lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious websites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=garmin+delta+upland+xc+modes
    • http://lnstagram-helping-centre.com/466717343252rvmn.pdf
    • http://siloxolilalapas.22web.org/kiwifruit_the_genus_actinidia.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • https://sebumeganajili.weebly.com/uploads/1/3/0/8/130874272/jisaxixovaj.pdf
    • https://gipumoku.weebly.com/uploads/1/3/4/7/134710759/wirujetas_momevipedeso.pdf
    • http://nunovoxiwanafuz.getenjoyment.net/fluke_1507_vs_1587.pdf
    • http://verifybadgehelp.com/lelejuzanesaxojsc4er.pdf
    • https://vumerajijo.weebly.com/uploads/1/3/2/8/132815742/6b55ecc2e5.pdf
    • https://gabavogafev.weebly.com/uploads/1/3/4/0/134000006/7547340.pdf
    • http://roramog.iblogger.org/nilovikufajimuk.pdf
    • https://ronojunigamedez.weebly.com/uploads/1/3/5/2/135297775/9933991.pdf
    • http://spencermcman.us/kinipanoxofozaluzonikow3wgl.pdf
    • https://visufevulun.weebly.com/uploads/1/3/4/3/134310134/duredugekopig.pdf
    • http://edapog.online/biologia_del_desarrollo_gilbertczs26.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lodonevubepivor.epizy.com/41408301903.pdf
    • http://monovopo.rf.gd/13349301835.pdf
    • http://maxuluxusit.atwebpages.com/dosor.pdf
    • http://gagoxapedako.epizy.com/derivatives_of_sine_and_cosine_worksheet.pdf
    • http://teruwisap.epizy.com/83833745548.pdf
    • http://foridifakusexum.rf.gd/14097669504.pdf
    • http://naxepedawizozet.onlinewebshop.net/adobe_acrobat_reader_offline_installer.pdf
    • http://sivokag.epizy.com/edexcel_loci_and_constructions_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118c2.bin
4c4fac25a978729368d833f95e69b086fefde9131003bad58688b37fde95b098
pdf-font-stream PDF embedded font (sfnt) at offset 0x118C2 5316 bytes
font_01_sfnt_off00012ac8.bin
7b2a7966fc805fb9f72eaff26607ad4403015809dd46487e68ee190a9c5b1300
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC8 10416 bytes