Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ce0ad1d495e9d9…

MALICIOUS

PDF

66.8 KB Created: 2021-03-02 04:12:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: aa493b011636099dbdabaca03fd766e2 SHA-1: 28a19ef55691624fbd472c9f466daac71bad8c35 SHA-256: d0ce0ad1d495e9d9339657e11e6c813dcd25a423afc1f285f74ece2939bbb233
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics further confirm its malicious nature, classifying it as a phishing or trojan. The document body, though heavily obfuscated, suggests a lure related to "unblocked games central", which is a common tactic for phishing or malware delivery.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/wix?keyword=unblocked+games+central PDF link annotation
    • https://joworuzofoluj.weebly.com/uploads/1/3/2/6/132683209/3f6be.pdfIn PDF document text
    • https://bigorofepomibed.weebly.com/uploads/1/3/4/4/134400252/e26bb0.pdfIn PDF document text
    • https://kezeminitiwo.weebly.com/uploads/1/3/4/4/134476020/1542516.pdfIn PDF document text
    • http://kernig.pro/english_spelling_test7btep.pdfIn PDF document text
    • http://gimepar.22web.org/astral_travel_for_beginners.pdfIn PDF document text
    • https://ponatuxo.weebly.com/uploads/1/3/4/5/134596183/2a5efb4.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/bajuse/chapter_2_review_answers_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/latagakezunaz.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/vlookup_and_hlookup_in_excel.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/93202686749.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/sims_3_cc_modern_furniture.pdfIn PDF document text
    • http://rugizasuvodaw.rf.gd/samsung_security_camera_sdr-b3300n.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/manualidades_con_papel_crepe_dia_de_muertos.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/blackberry_android_privacy.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_off0000ca6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6C 5456 bytes
SHA-256: 2b9f4e58a16e4d8b71b606a3d61ded093c5d0a9d5980945e170393e2681f9ad1
font_01_sfnt_off0000dce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE0 9872 bytes
SHA-256: 52678954bf9615da2bc6a967627c56992c84ff9b44e11a6389c6eb71b1b2ef57

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