Malicious PDF — malware analysis report

Static analysis result for SHA-256 7169a0f98709e160…

MALICIOUS

PDF

80.5 KB Created: 2021-09-12 04:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 039f3c6196bf0aa22f9c6f0ac7d9364d SHA-1: dec92bfa7dc9973da2ff868474c67edab02a401c SHA-256: 7169a0f98709e1609cb9acae1aca78437671edfd48950b09c8d96b669f36d007
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file with embedded JavaScript, which is a common technique for executing malicious code. It also contains numerous external URLs, many of which are hosted on potentially disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1df5598da---3774916396.pdf In PDF document text
    • http://agataklimowska.pl/userfiles/file/43296899642.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/73488006497.pdfIn PDF document text
    • http://podolsk-kondicionery.ru/upload_picture/file/64664833329.pdfIn PDF document text
    • https://divetechmarine.com/contents/files/lixokugazejujezudejafow.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/37783284228.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/59108436682.pdfIn PDF document text
    • http://muntepa.com/userfiles/files/8194261532.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/jetedowesuvajojot.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/tibubosipewazesasevosilul.pdfIn PDF document text
    • https://chingchia.com/uploads/files/202109011916115209.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/panivese.pdfIn PDF document text
    • http://celesteandtorsten.wedding/images/file/47809336746.pdfIn PDF document text
    • http://tion.hu/upload/file/bolabevesamojivokilov.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/19617637643.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/92129046758.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16134268630758---kosamudedizoriwirolimure.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/85303809935.pdfIn PDF document text
    • http://old.smartplus.pl/ckfinder/userfiles/files/ponuwa.pdfIn PDF document text
    • http://js-space.de/userfiles/file/zoxazemirukisa.pdfIn PDF document text
    • http://belly.bpv.su/content/files/files/49772951958.pdfIn PDF document text
    • https://aristi-trap.com/upload/users/files/18754705765.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=live+nettv+apk+download+for+android+tvPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/jogasizisepawos.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_off0000d81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF031 16816 bytes
SHA-256: d132c18c8ed829b900dd99ae718dd57c876778d2bb22b2dd450a4a96cf71cd34
font_02_sfnt_off00011bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD2 10524 bytes
SHA-256: c9c9e2ddd034857ae1f42a28ab99a820411f7427804fc2f0389b870f92c62fd1

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