Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65481b492a668cf…

MALICIOUS

PDF

71.3 KB Created: 2021-02-27 00:00:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b1f1621645e073c95546c41e67789b0e SHA-1: 4a05c3f3e9418da0167dc24e8a4f0599dae4c928 SHA-256: a65481b492a668cf299e95f6ce52a68942402ba620b46035e8de5f83426c5789
96 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to a 'battery charger'. The presence of embedded URLs and the ML classifier's high confidence indicate a malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=quiq+battery+charger+for+golf+cart PDF link annotation
    • http://tidirakozodawon.getenjoyment.net/d-link_dsl-2750u_software_update_download.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/unspoken_feelings_of_a_gentleman_ii_pierre_a_jeanty.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_6026e9596a5a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451752/normal_5fe5bc57bf0e7.pdfIn PDF document text
    • http://dugules.iblogger.org/charlton_v_shrewsbury_match_report.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/is_the_texas_driving_test_hard.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/rurikujolibebupex.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/kifarupesatanad.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/how_much_to_charge_for_after_construction_cleaning.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/biguterog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bajekixizosi.myartsonline.com/first_grade_worksheets_reading.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/witeranawugotoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/92618060630.pdfIn PDF document text
    • http://xegefonupekowa.epizy.com/diresamapavibujarisidobam.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/33255059468.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/53607627949.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_off0000dac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC4 5396 bytes
SHA-256: 97ecac1ae23fa56c03512bb7a41ccd6cc1a862d7a60b707c9cfe2c05b5036aac
font_01_sfnt_off0000ed29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED29 10240 bytes
SHA-256: b4b003619dde9ec0a2e197b9d8489211a2357b32652c4800ab1396549869175e

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