Malicious PDF — malware analysis report

Static analysis result for SHA-256 296d82be5406d6c2…

MALICIOUS

PDF

90.3 KB Created: 2021-07-08 12:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3fec9268be8c58015d7158ea03ec03d7 SHA-1: bbb420edfc7cb752d14ad047e60b2cf1a57687c5 SHA-256: 296d82be5406d6c2498b108a21819369366aae021d20cb972e19e45d729c053f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded JavaScript stream and a large number of external links, many pointing to compromised or disposable domains, indicating a phishing or spam distribution attempt. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12891914936.pdf In PDF document text
    • http://namngonviet.vn/user-/files/jokope.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/70c0cd1b27b7673a9fa4316279ea981d/panuw.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/2b6cfa5c9e3f1a4d3a84edd6f66f47d9/84487471878.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/manaxusemulifivunize.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/wobowitagujodudimezik.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609447bf8c69c---23304729522.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/33988257201.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/jupozubasegilivajoj.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a250d7a9233---zekorogiredewawulevo.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ba952ac0c---25891190483.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/muwifav.pdfIn PDF document text
    • http://haus-st-otmar.ch/userfiles/files/gesagapetamevonajisam.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/sopajowibaxazubipobito.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871432f0059---fugifalukimamasaxonipo.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/41698250990.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/17472093686.pdfIn PDF document text
    • https://digireg.se/upload/lidumakokerurul.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/e74d56ea3334088cd8f67d5e1cfb6757/7144322018.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/f8781d10c19afa27db00f629baf6501a/32146751480.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/kot9g08a3er42ui8klo5b90htg/4296865171.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/1556247610.pdfIn PDF document text
    • https://local-atlas.ru/userfiles/files/12377598812.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/7d4dd76a6118a3950cdf77386312a90e/ridasixiwofasoxekiluwi.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/51348923164.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/nerolovasid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=mainframe+faqs+and+answersPDF link annotation
    • 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_off0000ff27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF27 10476 bytes
SHA-256: d6e33e5b89b8997e18136f4e4b848495d3569fd9e75c0261a6697d9191ee4851
font_01_sfnt_off000116bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECE 17288 bytes
SHA-256: 0768c24c2dfd7a9de9ee9a30d304455c4e0948c0a6f438d965689f7ec10b4485