Malicious PDF — malware analysis report

Static analysis result for SHA-256 800d0d0aeb21c5f5…

MALICIOUS

PDF

75.9 KB Created: 2021-06-27 00:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6389c6b9207fb8fa1402bae5081fa688 SHA-1: f243be07ba04d140ab1cc6737b853b5cdc9aef65 SHA-256: 800d0d0aeb21c5f5c21268b78c1db39368337e843afde67be7aa599d719e7335
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document exhibits characteristics of a remote-support tool lure and a callback phishing lure, suggesting an attempt to trick the user into installing potentially malicious software or divulging sensitive information. Multiple URLs pointing to compromised WordPress sites and potentially disposable hosting were extracted, indicating a link farm designed to redirect users to malicious content. No scripts were extracted, but the document's structure and heuristic firings strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079aa3015440---fovewipuzaf.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adb04474c75---53894693296.pdf
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rukevopalenomapotaduvu.pdf
    • http://activesolutionelectric.com/images/file/vatawaxoxudujenetidavaj.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607425831ed39---xixoluzerewipixexopifap.pdf
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cab61d432d---70661184733.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/29e594013ae4b864e061aa0ef2dcf0c3/wijowirexutusukepede.pdf
    • https://casabresciani.it/uploads/file/sixagiwiradolotedusuj.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160756f9a801c6---dofubovifokiw.pdf
    • http://www.tiande-global.com/ckfinder/userfiles/files/jiwokup.pdf
    • http://lycee-elm.org/userfiles/file/risezuzirakirul.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/8d7c370e02bffa5c58702e3c892fcc07/nenovefa.pdf
    • http://dui-antidote.com/images/userfiles/file/91247032302.pdf
    • http://highlandcougars83.com/clients/2/26/268573c5102cd00412bac87cee9346ec/File/lipirogefapupimekajakix.pdf
    • http://marinapogon.pl/upload/file/41523794212.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/aaf92549d0f5532ba26ed6cc97c69303/86579821123.pdf
    • https://calmoinc.com/upload/editor/file/xipomewugokolozuto.pdf
    • https://autoradiator.mn/uploads/ckfinder/files/65071110140.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/9hgec8r30249v61ed37cpbsk30/59887337558.pdf
    • http://czdashan.cn/uploadfile/file/2021051705481273499.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/7561d84ddc322f63aa3ed76e6381e5f7/86587071200.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/4984671468877c50d2780e7a98cf6255/lelilibagidipizurafotipik.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=links+and+tees
    • 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_off0000c962.bin
16268d62d7a507b2e5f6e35e2b0bf9cdd3bb9b3c025bcad76e12ca9e535f5934
pdf-font-stream PDF embedded font (sfnt) at offset 0xC962 10024 bytes
font_01_sfnt_off0000dfb9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB9 16792 bytes
font_02_sfnt_off0000f7cb.bin
95c8d166e7a83bf51e8a76f1b4e52b6f71c0f57f18f86e0f512384715d07019b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CB 16448 bytes