Malicious PDF — malware analysis report

Static analysis result for SHA-256 b65207c48922cba8…

MALICIOUS

PDF

83.0 KB Created: 2021-09-20 15:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 35de3a228dadd5f00c0695b609435d7c SHA-1: ad2712533844fad15cb7e8e8f3a4f252ad240ae0 SHA-256: b65207c48922cba844cd73c85415786071786e7c3fd7a5782bc84575b2295f89
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://garglob.ru/uplcv?utm_term=how+to+remove+background+from+image+in+android PDF link annotation
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/tinuzodunumomawigujamo.pdfIn PDF document text
    • http://ckpak.com/fckeditor/userfiles/file/60905886712.pdfIn PDF document text
    • https://bonekarusa.com/contents/files/68888772918.pdfIn PDF document text
    • http://www.gpkoaee.ru/ckfinder/userfiles/files/62890020868.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210913_164929_4242.pdfIn PDF document text
    • http://gzbaosui.com/uploadfile/files/moxizu.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16141e16c04e36---85791115781.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/29647400972.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/worekodukitaven.pdfIn PDF document text
    • http://hrudolf.com/userfiles/70582028885.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/nodezelevavijizipazejadap.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/vejeriwawebetoselupo.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/fajajifimetosebos.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/51192192442.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210911201622.pdfIn PDF document text
    • https://nicklason.se/ckfinder/userfiles/files/bekatosivamazetede.pdfIn PDF document text
    • https://inunekocp.jp/mailmagazine/upload/files/lebijavufolirebori.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/kafenubemowotobanozanu.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/gusevopadagesegeviwogi.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/36477553752.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/65840654028.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/kisemekawixa.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/zobesugetunaladozoxowatiw.pdfIn PDF document text
    • https://menokatea.in/ckfinder/userfiles/files/24799298710.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/26077792204.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6D 11080 bytes
SHA-256: 39251fce0c09db817616e48c1705a4ebba42864186e2309e0d28f853f35ecdc7
font_01_sfnt_off0000f913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF913 17384 bytes
SHA-256: 33680763bf1eed1553f83b2f19bdaccf1745710676099007f79f06509964493f
font_02_sfnt_off00012622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12622 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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