Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca7e134f5b4494fd…

MALICIOUS

PDF

71.3 KB Created: 2021-02-24 13:29:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e169873f3070636985c999b63e4a969 SHA-1: 45899d3422734e397f35ce815ed346eb39079ca0 SHA-256: ca7e134f5b4494fdda89d28083ad6a92392dcbcf029969f1c0d1d38653ebfead
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL and document body suggest a phishing attempt to trick users into downloading a 'premium apk'. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed for initial access via spearphishing.

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://druttle.ru/wix?keyword=download+videodevil+premium+apk
    • https://cdn.sqhk.co/keropolor/DgdDRhi/tofesubomusan.pdf
    • http://wedavinonuvovu.22web.org/dyson_animal_cordless_vacuum_best_price.pdf
    • http://zumarez.22web.org/issues_in_financial_accounting_16th_edition.pdf
    • https://cdn.sqhk.co/vetukalujir/iewjahh/47442817271.pdf
    • https://cdn.sqhk.co/kululojilo/9BidLO0/wadex.pdf
    • https://cdn.sqhk.co/fofubulami/hfgJAZY/wool_stair_runners_by_the_foot.pdf
    • https://cdn.sqhk.co/wanaxowuwot/hXmgeec/nimarovidaderuvanavi.pdf
    • http://xirixakexove.iblogger.org/vocal_remover_for_karaoke_apkpure.pdf
    • https://cdn.sqhk.co/siboxowimu/jXgeOib/24151565484.pdf
    • http://sodahq.pro/78251682339ismib.pdf
    • http://delaem-sami.online/dnd_5e_book_of_ancient_secretshdyot.pdf
    • http://mixed-rootwork.com/pictograph_and_bar_graph_worksheets_3rd_grade1zfuv.pdf
    • http://pafiwuz.66ghz.com/how_to_restore_samsung_tablet_10.1.pdf
    • https://cdn.sqhk.co/dexujagafir/dLhdPgg/nanolaxa.pdf
    • http://seedcraft.online/nifupifv4vrd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sajatofubote/internship_agreement_template_netherlands.pdf
    • http://pupovedifa.rf.gd/autocad_2015_crack_only_64_bit.pdf
    • http://maguvotu.rf.gd/68321082486.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_off0000d90e.bin
92635797f4be2e20b95df099186002953010aa3cba4dfd9e0b935a931f85fcff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD90E 5140 bytes
font_01_sfnt_off0000ea97.bin
c263f6fb173429c2beba7a6e8b322db3ca4025aac7575ccb641bb9c35b435889		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA97 10844 bytes

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