Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e29ad338b099864…

MALICIOUS

PDF

71.2 KB Created: 2021-09-29 00:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 84949d632b4137e9836178de9eff1779 SHA-1: 0a4f67ab849c4825f1291a603cc955a3aa40169c SHA-256: 1e29ad338b0998646a11bdc598147f3b05ba227cf4144090c0a1235cb9174fa2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple disposable hosts, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://profession-your-dr.com/uploads/files/202109101245591976.pdf In PDF document text
    • http://xn--oy2b9bv81anouola.com/upload/file/202109071855565413.pdfIn PDF document text
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/30171305370.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16135ab864a76d---rexorugajusawanosi.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/23100802229.pdfIn PDF document text
    • https://www.barefoothoa.com/webroot/js/ckfinder/userfiles/files/78160142222.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/rosizoz.pdfIn PDF document text
    • https://varida-tech.com/ckfinder/userfiles/files/gaxama.pdfIn PDF document text
    • https://jobtiara.com/files/files/49910047346.pdfIn PDF document text
    • https://dafelia.com/files/11103240913.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/zixuxupikilebuga.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/vezizedemiwosul.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/jozolexokawavelozeref.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///zoral.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/tamiramudinuk.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/boxikutikisukodoz.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16147c1c61103d---jixexopepegaladiluk.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/99944987675.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/79c08da7dc45bb1ae48747afc58d0304/rutidijowutanigunamemeru.pdfIn PDF document text
    • http://quesnelfoundation.ca/userfiles/file/61691781249.pdfIn PDF document text
    • https://primer-spb.ru/files/files/warulezuzuji.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/gisafe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=minecraft+pe+android+free+apkPDF 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_off0000b2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000caf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF2 17204 bytes
SHA-256: b3414f9030da36be7829a59cf5a7d17c0a7a1f314e8bec5448782b724ea835d1
font_02_sfnt_off0000f6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F1 10484 bytes
SHA-256: e39abeb343c173b254ebf8edeb6f920fb7af910cdc0b2c049aeec750a33b8cb1