Malicious PDF — malware analysis report

Static analysis result for SHA-256 9331baa78260f3ce…

MALICIOUS

PDF

93.0 KB Created: 2021-07-30 04:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d17126100e5d0891abc94d6b0ba1fdd7 SHA-1: 254b1096a9879f9785edcb6d177a7cf267bee503 SHA-256: 9331baa78260f3ce0f69eafd6072275f8ba19c93c37134a1870210993498c8b0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious or deceptive content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e7ec636ff---zeserumukedewubisik.pdf
    • http://psychoterapia-przemysl.net/img/userfiles/file/nugelex.pdf
    • https://tlkingatlan.hu/kepek/other/file/81757925683.pdf
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/79815520785.pdf
    • http://tsrmmessina.it/userfiles/files/livisurinad.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/1c74257bd68d54e34b28f655411f481f/70179217320.pdf
    • http://quaker1960.com/clients/3/34/346d0055920ff30d27c63167e405b0e7/File/30901422078.pdf
    • http://studiotecnicomartani.eu/userfiles/files/vetizaselasa.pdf
    • https://imotrading.com/images/userfiles/62938823948.pdf
    • https://sinarwaja.com/account/files/40999772308.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609109c7ad1b8---giwitatasixolov.pdf
    • http://susutour.com/userfile/file/tifozezibugo.pdf
    • https://mecaniquekd.ca/upload/file/76249157380.pdf
    • http://zuche0551.com/upload/file/25563415410.pdf
    • http://ewinghighclassof1963.com/clients/e/e4/e4cb61fc1babc639533983e887b7272d/File/91736136977.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160926d6d18be3---ditoxi.pdf
    • http://adveotec.com/img/file/zolimunesijoxedudiwuwine.pdf
    • http://patroha.hu/file/xixoxewujasereguli.pdf
    • http://dytac.hk/userfiles/24360734510.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095636c247b7---32625128473.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609886765a212---binukesibevowo.pdf
    • http://thebrownsfamilyreunion2008.com/clients/81208/File/javavesepepop.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/4jqdd3egtekdteq003f4n2jtng/kugizawadiv.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/b2c448a02cbe3688aa61fd8fb074c132/6957418016.pdf
    • http://stellarp.com/userfiles/files/70058201378.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=coreldraw+2019+how+to+use
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001024b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1024B 16792 bytes
font_01_sfnt_off00011a62.bin
03b87266276b5e779fb6c20343f139dec912b3dbaec9fe8e8e42226983d870e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A62 10828 bytes
font_02_sfnt_off000133b6.bin
335eed7d96627acecd002d4f774c09cc65a8b038413f36d2ae467d7eee082f3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x133B6 18624 bytes