Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5575de9a3fc92b…

MALICIOUS

PDF

67.9 KB Created: 2021-06-07 01:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2fa80341870c5eca1c652adf6743cabc SHA-1: c5c5bcb644b9798c7bdd4de9db4e6927c1668648 SHA-256: bc5575de9a3fc92b73397f1eeecd8d10b868687f124f5f52fc5ab7e7e6c8712d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary suspicious URL pointing to a domain known for phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely a phishing page or a further malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/123?utm_term=adam+ruins+everything+full+episodes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415292/normal_6010d949204d9.pdfIn PDF document text
    • https://telazavax.weebly.com/uploads/1/3/4/7/134729689/f418a9aab5d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387567/normal_600918ef50975.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479942/normal_5fed1e8010646.pdfIn PDF document text
    • https://zozutogumudeke.weebly.com/uploads/1/3/4/4/134440166/307335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496374/normal_604d31104c235.pdfIn PDF document text
    • https://vixugusimuxomuj.weebly.com/uploads/1/3/0/9/130969476/7e36c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452865/normal_5fee14ea5eb1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409258/normal_60302c5e3ebaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413987/normal_605571d1cc474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_600d2550800b1.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4413016/normal_60b30c785bcf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490515/normal_6048e6ec55f57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379726/normal_5ff691952fc6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pebenuziwi.pbworks.com/f/beredobirunak.pdfIn PDF document text
    • http://mogulobobis.pbworks.com/w/file/fetch/144489858/8927611962.pdfIn PDF document text
    • http://divogatupum.pbworks.com/w/file/fetch/144751047/free_movie_apps_for_android_tv_2020.pdfIn PDF document text
    • http://vulazojab.pbworks.com/w/file/fetch/144750789/latest_bollywood_movies_2019_mp4_free_download.pdfIn PDF document text
    • http://doxawadar.pbworks.com/w/file/fetch/144682275/how_to_connect_blackweb_bluetooth_speaker_to_iphone.pdfIn PDF document text
    • http://gexufak.pbworks.com/f/cch_hack_spin_coin_master_2020_android.pdfIn PDF document text
    • http://bavudexote.pbworks.com/w/file/fetch/144725436/50515647940.pdfIn PDF document text
    • http://subazim.pbworks.com/f/bobcat_t190_hydraulic_motor.pdfIn PDF document text
    • http://ronuzexem.pbworks.com/w/file/fetch/144427506/amazon_blue_badge_conversion_2020.pdfIn PDF document text
    • http://vogituvu.pbworks.com/f/how_to_convert_jpg_to_cdr_in_photoshop.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_off0000cb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB99 5608 bytes
SHA-256: e3b2218891ea95633991b9b2953c9e98ebdab6544f656d0781c8bb38f16c2b8b
font_01_sfnt_off0000de91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE91 10692 bytes
SHA-256: 6bc47f4942bea8aafd2d5857fbb0415649f37d359455514e636e812fdad47e1f

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