Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fefd7cadeb6d99…

MALICIOUS

PDF

81.2 KB Created: 2021-07-03 01:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fbaec13449d47d9bb40753689a5ba762 SHA-1: decbd7171c38691813b573ec8e000bf1b595fe2b SHA-256: 97fefd7cadeb6d995e8cc379cb92d012f9f302f68a2663644c1a7ac05c516599
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to distribute malicious content or phish users. The presence of these links indicates a likely spearphishing attachment vector, aiming to lure victims to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/5332cc27fc4f04786dff54944ec3191b/49985839717.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/96f5e4e98f401bb9ffa5245191a182bf/2528270110.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb45d58f9b---43577371724.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb40c74a4---80437728741.pdf
    • http://nusratali.com/userfiles/files/goduxepe.pdf
    • http://deborahbrown.us/clients/860103/File/kajekojis.pdf
    • http://domeinbeverdonk.be/assets/files/file/69744240084.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/grf05ak4tvqqjch4evgf9k3c16/zebepafizazefudidapegisa.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/9q5imttofuv29vbfbfnsgt61sj/31559325262.pdf
    • http://akcjonariusz.com/UserFiles/file/73552622161.pdf
    • http://homespakistan.net/magzine/uploadfiles/file/pisazivowika.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/fodozobinuwuzebirik.pdf
    • http://cedule-plachty.cz/files/file/nadosejifanudututa.pdf
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/xizafisozoveduduf.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609b18fc9744e---wofemenozifobevipinewarib.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/a6a3e1a6b00356709897482267f912bb/66736519253.pdf
    • https://bahia-group.com/ckfinder/userfiles/files/gosibepowanareziso.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4015a60889---tobopajigijubofe.pdf
    • https://x-software.cz/data/file/bawemefajedojuja.pdf
    • https://ipic.vn/userfiles/file/30332073048.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f3fa6b7f6---jirubibibizifezerurape.pdf
    • http://altaprecision.com/userfiles/file/tewenubix.pdf
    • http://aelma.com/sites/default/userfiles/file/36285997221.pdf
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/35510328369.pdf
    • http://share-world.tw/userfiles/file/lolinuvenanamifazidabu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=1200+usd+to+cad
    • 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_off0000dd00.bin
7495bae2d7480b07790aa5a0911df275abe7b219bebba932ab13b0348650f86c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD00 16560 bytes
font_01_sfnt_off00010888.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10888 16792 bytes
font_02_sfnt_off0001209f.bin
0c02666395a3425996ad6ec653c7ad8a5207822838f3a4e7eaeb08f193fa6192
pdf-font-stream PDF embedded font (sfnt) at offset 0x1209F 10188 bytes