Malicious PDF — malware analysis report

Static analysis result for SHA-256 26adf3cf5ba1bacb…

MALICIOUS

PDF

90.1 KB Created: 2021-03-04 13:01:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 7017fb27f5237dc64a8e3e20647ae7ba SHA-1: 4dbcb46925da9ea281b276a39a24d5040d1eca3b SHA-256: 26adf3cf5ba1bacbfd91817bfb45e4c7a6de00ab2c62ed8c4dda82551a89deb7
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text that appears to be a lure related to popular book series, suggesting a social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=is+percy+jackson+in+the+trials+of+apollo+book+5 PDF link annotation
    • http://viniveba.mywebcommunity.org/ninupoxowoduru.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/pamumomekesinijor.pdfIn PDF document text
    • http://freedate18.xyz/father_and_son_summary_odyssey0oyl1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_6038bd7b7cd87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470524/normal_602eee3f79994.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369769/normal_5ff977e0c2086.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466398/normal_6008bfcae6470.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447641/normal_5ff3001c79cf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466411/normal_6010101f70d04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426422/normal_5ffed22a88abc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_601f2e0489862.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/judubomino.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389108/normal_5fe41126cf8fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/equality_act_2018.pdfIn PDF document text
    • http://mifotabelimudon.myartsonline.com/the_gabriel_method_21_day_meditation_reviews.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/how_do_i_fix_my_nextbook_tablet.pdfIn PDF document text
    • http://viwuwijagabote.myartsonline.com/business_communication_and_report_writing_course_outline.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/game_ppsspp_crash_bandicoot_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11675 5332 bytes
SHA-256: 8671a2745cd0786f6b872e7f2295785f5aceb86f581c7566488cb654a65d5a89
font_01_sfnt_off00012893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12893 10592 bytes
SHA-256: 3144923781f853990121e6efdc4f5fa744e5bebada8a70c778bfd7564887f35f
font_02_sfnt_off00014ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CCF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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