Malicious PDF — malware analysis report

Static analysis result for SHA-256 b56defb49d5f6a6c…

MALICIOUS

PDF

98.7 KB Created: 2021-03-26 06:56:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fb53a64d927969eb63982485e26b1090 SHA-1: b177ff1673527bfabf1fff699f8891909f302af0 SHA-256: b56defb49d5f6a6c0f12d97edf63170b110ad5fc43a79fd6401baccab2bce91e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/123?utm_term=ishares+biotech+etf+fact+sheet PDF link annotation
    • http://povisowalikim.scienceontheweb.net/cessna_152_flight_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467322/normal_603a44ff6f932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457838/normal_5fe6f2b00fe3a.pdfIn PDF document text
    • https://cdn.sqhk.co/mirofifuba/FiiDkvX/google_chrome_for_redhat_linux_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453142/normal_5ff4225730a4b.pdfIn PDF document text
    • http://zitirisiz.mywebcommunity.org/98919073460.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495264/normal_5fe2b0365e0cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456398/normal_6033e629b27d1.pdfIn PDF document text
    • https://cdn.sqhk.co/wubofuse/ccQZvXd/star_realms_card_game_strategy.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/gopifu/amar_chitra_katha_video.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/pavotosakafesodudisagoli.pdfIn PDF document text
    • http://gupizamowakop.myartsonline.com/sugim.pdfIn PDF document text
    • http://relivoziz.atwebpages.com/how_to_learn_android_programming_language.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/30966204563.pdfIn PDF document text
    • http://jojulupijawide.onlinewebshop.net/catfish_farming_in_tanks.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/dopovufopan.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/60445408736.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/tofolujemumize.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/turerovenimamivugikoris.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/28623677741.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/how_to_clean_primo_water_dispenser_with_vinegar.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/42719402667.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/madigonuni.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_off00014334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14334 5012 bytes
SHA-256: a017fef12345290e5df3f13381632c599b05de6760188301bc1d4ec7ddfe9f5f
font_01_sfnt_off0001543a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1543A 11652 bytes
SHA-256: 5e755e61d62fc7396eca76f7fd75635e82a36502b945431b7b2a74d23ddf4f96

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