Malicious PDF — malware analysis report

Static analysis result for SHA-256 1046aaeed3c7d5a2…

MALICIOUS

PDF

99.2 KB Created: 2021-09-06 01:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fb22bd9a702f7fa4d8ce47719493eeb8 SHA-1: 3238110cd21b292f0b91183b583b26cb2636312f SHA-256: 1046aaeed3c7d5a2a61cbc3fadbca05bef8c1c815d99eb938c96105dff10b895
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nomylo.ru/uplcv?utm_term=hp+jet+fusion+3d+4200+user+manual PDF link annotation
    • https://giorgiosantinelli.it/file/xilazizoxesalekif.pdfIn PDF document text
    • http://armanetti.com/images/45932383946.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/ledab.pdfIn PDF document text
    • https://laptopserwis.com/app/webroot/media/files/2459752904.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/bp4vhap1bn3nbnhpkj42d1u4n7/gujup.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/40291323212.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160ee2059adbc2---373621873.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/f9n25ge5s012lto0uleghu8235/53247671431.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef45c084c1---dojagomowaz.pdfIn PDF document text
    • http://ty-int.com/files/files/21200747024.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/getidamafap.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/teveminebugem.pdfIn PDF document text
    • http://salwex.hu/file/85613527710.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/pagozaretim.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e82ba0559b---42556249956.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/jiwajemunonulejo.pdfIn PDF document text
    • http://lovesenergy.com/file/vexem.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-28/20210628005411317819.pdfIn PDF document text
    • https://cerquilho.sp.gov.br/public/admin/globalarq/uploads/files/wigesutodi.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/3c04e43965b0e24aaede2df4a020dd32/16431207145.pdfIn PDF document text
    • http://benjamin1908.com/clients/f/f4/f4560e3fe432b95d15e234f900dec36a/File/38815148888.pdfIn PDF document text
    • http://tcihk.com/userfiles/gubavinasu.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/ae55b5c045fd1e1e5a06b712382a0daf/wodovewazolovapujijazit.pdfIn PDF document text
    • https://ijpdua.com/contents//files/bijodiwege.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/85459802090.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_off00011727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11727 11372 bytes
SHA-256: 19e18b037bb2d39aa3ea96e4ceab21b921ec1bdb3b356e3ad0dd9f8262bd0bbb
font_01_sfnt_off000131f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F0 20372 bytes
SHA-256: b62480d80974b8058b61a4a137e925e55953f0060be051d9d8fe7979d1e012b9
font_02_sfnt_off000166d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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