Malicious PDF — malware analysis report

Static analysis result for SHA-256 a105725971392d41…

MALICIOUS

PDF

91.2 KB Created: 2021-03-18 00:20:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79bc88faa3d4536cbf3f5a3a610cd988 SHA-1: eb4f639b747ac0b85b7f09377c841a4736c9de4d SHA-256: a105725971392d4120002979c68cbca474549c0d80a54a73c9fce2f1f24b790b
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. It contains an embedded URI pointing to a suspicious domain, which is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain keywords related to the embedded URI, suggesting a lure.

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://leonvi.ru/wix?keyword=kenmore+mini+ultra+sewing+machine+power+cord
    • http://zukilobuzoroko.66ghz.com/gububimulaj.pdf
    • http://websecurer.tech/fekabavebufamgog2.pdf
    • http://tapagigozi.medianewsonline.com/what_are_the_components_of_a_newspaper_article.pdf
    • http://kdghy.online/is_frank_in_the_trials_of_apollo4d49q.pdf
    • http://lerob.info/ford_mustang_2020_convertible_blacki72id.pdf
    • http://findssldz.xyz/niriworawetogebiwonopomw87y.pdf
    • http://wawesoja.sportsontheweb.net/does_bitcoin_count_as_a_day_trade_on_robinhood.pdf
    • http://siteznakomstv69.space/83013766820quhrp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ketufazez.rf.gd/birds_brushes_photoshop_cs6_free.pdf
    • https://s3.amazonaws.com/lebejos/internal_auditing_assurance__advisory_services_3rd_edition.pdf
    • https://s3.amazonaws.com/matogapibelifiv/6877676672.pdf
    • https://s3.amazonaws.com/kufazete/53132415003.pdf
    • http://logeger.rf.gd/nagub.pdf
    • https://s3.amazonaws.com/xumakomowi/kabogigexeretiti.pdf
    • https://s3.amazonaws.com/widiku/rinonuforarekakise.pdf
    • https://s3.amazonaws.com/fewunadupop/coinbase_earn_answers_dai.pdf
    • https://s3.amazonaws.com/pusolefosex/new_hip_hop_albums_2018_free.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_off000126d7.bin
71ca097cdae0075e549e142912726a130f3c4e9684894563e1bf8b0ef179599c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126D7 5548 bytes
font_01_sfnt_off0001399e.bin
15e9a75f8c7da8bf59cb8582b47e5b66c5bb538428c2a9da606d6d22fcc39ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1399E 11076 bytes

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