Malicious PDF — malware analysis report

Static analysis result for SHA-256 97bafc361867b2dd…

MALICIOUS

PDF

92.9 KB Created: 2021-07-23 07:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 38b1d1a663e8d4b7d47c4a38b341464c SHA-1: 845156706a3c8dcf4d55ce5c66f5eb0bd83afee5 SHA-256: 97bafc361867b2dd388922e26446cd30515d3daf3d50021fa5f03a3f98df4f92
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a link farm pointing to numerous suspicious URLs, many hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The presence of embedded JavaScript suggests an attempt to execute code within the user's browser.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 7

  • 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.
  • 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://aaaexpressac.com/userfiles/file/3503077525.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/282c8cafb3f0c2b1ebefffb195d69093/14403786906.pdf
    • http://gold-carsales.com/js/upload/files/41644377.pdf
    • http://slhs1958.com/clients/18590/File/65024888251.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b257126f4f7---35297412566.pdf
    • http://geoodwierty.pl/files/file/30401387720.pdf
    • https://drticket.ir/basefile/drtiketcom/files/24091759152.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/6b1b5401cc5c5937de9df5792922b3a4/67102287942.pdf
    • http://quaretti.it/userfiles/files/guxowifedesagekujexawa.pdf
    • http://meadescafe.com/userfiles/file/6520606192.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5eb43903d---51262648172.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/135140c6c1d8a91feea0fdaec430ccbe/pukosuwadikuf.pdf
    • http://quinta.cl/upload/files/nobedijejixot.pdf
    • http://www.impactit.in/ckfinder/userfiles/files/voramejunuwefemoved.pdf
    • http://qtjdb.com/UploadFile/2021/05/12/file/20210512_224116_149.pdf
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/54421540486.pdf
    • https://tlproduct.com/userfiles/file/kewulugavugosetu.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160c42ff406520---7026938586.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4daa93641c---12417772890.pdf
    • http://podlahypilat.cz/admin/file/mujokune.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607909fc4e806---rifatorulijurotir.pdf
    • http://vipnjl.com/userfiles/files/gukowivalepal.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/f41f1c2ed194f397f63324a370976d17/jirevelebasasep.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607128b65664a---defamutozunitexexala.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c90034730---12832390649.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c32814b8d37---2932959430.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=watch+malibu%27s+most+wanted+full+movie+online+free
    • 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_off00010459.bin
ff0f3f5f7ead6ca6d936ffd24980302137bc7411e02d5991e7939b6223d74683
pdf-font-stream PDF embedded font (sfnt) at offset 0x10459 16968 bytes
font_01_sfnt_off00013072.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13072 16792 bytes
font_02_sfnt_off00014889.bin
1d03ad12782836e64243989f930c7c65ec28cbaf9c70eaf6f2c414d49b95d699
pdf-font-stream PDF embedded font (sfnt) at offset 0x14889 11160 bytes