Malicious PDF — malware analysis report

Static analysis result for SHA-256 2abf0970985c0824…

MALICIOUS

PDF

97.9 KB Created: 2021-03-01 04:47:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b834b43399082c53cf2b26bf5d2e437e SHA-1: d998f294db322d40710e0096febae6b07c68f41e SHA-256: 2abf0970985c0824c6d67b669276e1c19cf5b43b8854924c08260e6365ee7f7a
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that leads to a suspicious domain, likely intended to host a phishing or malware payload. The document body, though heavily obfuscated, suggests a lure related to educational worksheets, a common tactic for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=volume+of+cones+spheres+and+cylinders+worksheet+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476302/normal_5fcacb4d6dddd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414152/normal_5fd06bced896c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495531/normal_602c98dd33a29.pdfIn PDF document text
    • http://hookup753.fun/conclusion_of_training_report_sampledri40.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/vanatul/yaari_avneet_kaur_song_mp4.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/94858471228.pdfIn PDF document text
    • http://vivimaga.epizy.com/31263339901.pdfIn PDF document text
    • http://zerowegujij.onlinewebshop.net/tonejud.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/luveputupedatunugefox.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/chausson_630_manual.pdfIn PDF document text
    • http://xonekalanalu.epizy.com/xovidonadeboziwasuvul.pdfIn PDF document text
    • http://pavirej.rf.gd/formal_letter_for_job_interview.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/3799461654.pdfIn PDF document text
    • http://tixuxunu.epizy.com/99132895598.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/weekly_schedule_template_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/what_is_the_best_stand_mixer_for_baking.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B54 5616 bytes
SHA-256: 8d57e258644bd64e2a8fe1ae816c88efdb07168c6f988dccd04b86f65071c139
font_01_sfnt_off00013e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E67 11316 bytes
SHA-256: d8d34d74d3b05331442703c5c3846d70614414a9be23f0579b0dbd3625d56269
font_02_sfnt_off000164e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164E8 16096 bytes
SHA-256: 3bb08857b08983a257d5a2052628e18542fd51c8d29f5bbef87ea8b8ace00841

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