Malicious PDF — malware analysis report

Static analysis result for SHA-256 31869f4f5f3020f1…

MALICIOUS

PDF

165.9 KB Created: 2021-03-22 05:32:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a517a963069dd46b493a72975d559bd SHA-1: 117cae95121fc81142b1d82eb58765adccbf1eb2 SHA-256: 31869f4f5f3020f1a9587d327be8517d7d73da0d72845ad63610182473780764
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it contains advance-fee scam language, typical of phishing lures. The document embeds external URIs, including one pointing to 'mezovuduw.ru', which likely serves as a landing page for the scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://mezovuduw.ru/award?keyword=ihsa+basketball+rule+book+pdf
    • https://vojizozovogimum.weebly.com/uploads/1/3/0/7/130740342/perok-papidonisedo-vibexebi.pdf
    • http://pejubuga.iblogger.org/87709970690.pdf
    • https://dorigobumin.weebly.com/uploads/1/3/1/3/131384291/2e1c5a86e0f6.pdf
    • http://kotumixevana.22web.org/is_the_4.7_v8_magnum_a_good_engine.pdf
    • https://cdn.sqhk.co/tefozakozup/xzOid4t/world_soccer_stars.pdf
    • https://sutapupimode.weebly.com/uploads/1/3/4/6/134615637/rixudogesiwamig.pdf
    • https://cdn.sqhk.co/bujerinalo/ascHVii/94426720286.pdf
    • https://cdn.sqhk.co/benanejufa/uhdqehd/smash_it_with_a_hammer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ec1825fa-6d92-42d7-8d31-211da6cd38da/80669073555.pdf
    • https://s3.amazonaws.com/loranoduzuja/act-_67c-_practice_reading_test_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/8f4f7cf4-04af-449b-92a6-e11e139ba0ac/54630704193.pdf
    • https://s3.amazonaws.com/xutomoxu/debet.pdf
    • https://s3.amazonaws.com/gowebabuxogiro/segujekize.pdf
    • http://genenapukiral.epizy.com/69023366193.pdf
    • https://s3.amazonaws.com/pokorevalaxex/jigavuguretezeboraduri.pdf
    • https://s3.amazonaws.com/wibedubosateg/wapsi_fly_tying_kit_review.pdf
    • https://s3.amazonaws.com/tinivukedeta/64668393354.pdf
    • https://s3.amazonaws.com/tiduro/romevisorulixo.pdf
    • https://s3.amazonaws.com/ganubifirigevi/57846457791.pdf
    • https://s3.amazonaws.com/wujafivabipo/cen_tech_battery_charger_code_ef02.pdf
    • https://s3.amazonaws.com/xakajoziwibi/chhatrapati_shivaji_terminus_information_in_marathi.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_off00024db5.bin
9c62d14a35cf062ccb8ad5569529f876033a4bfa4340b191deb84129e1f0acf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24DB5 5272 bytes
font_01_sfnt_off00025f8e.bin
0caba230712d954835dbe43c5b6491fb812493e5501f4e48ac4d81455a5037a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25F8E 12516 bytes

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