Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60ea907e40c7a41…

MALICIOUS

PDF

98.8 KB Created: 2021-09-22 19:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 468c9b7352b06c40c5eb27d7585e876b SHA-1: d3a95683b1d250aff2370f0b23263ff0590c5059 SHA-256: d60ea907e40c7a4126e4b6c7aa987833b372aacb5f93b4f5f0189fa8eb2157c9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138fc35c5689---pujekoki.pdf In PDF document text
    • http://www.americaninvest.net/upls/files/13281986795.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/tamokuvuzuxif.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/podixefavexakibo.pdfIn PDF document text
    • http://yingtailong.com/upload/file/210901131237706023ebo8i9b9s4nb.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/210903120340799773rsom1c.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380a4f5d65d---peletopimok.pdfIn PDF document text
    • https://www.bankkartya.hu/js/ckfinder/userfiles/files/xojamilemo.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/5037240a76b632fb6ff07f67d1c80bb7/54560472211.pdfIn PDF document text
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/98141238650.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/tujajivadovixabofumaj.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/88268551005.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/8138855633.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/lodifa.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/pemavijobasekodosudama.pdfIn PDF document text
    • http://maidichike.com/upload/files/64407511416.pdfIn PDF document text
    • http://zkpower.net/upload/files/sitiropibulidevajilopuf.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146716ddef8e---8907422112.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/lugod.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/78688339650.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/71912738991.pdfIn PDF document text
    • https://scalper.ir/data/files/file/zinanomaluw.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/82063727229.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/33822899751.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=dark+eldar+3rd+edition+codex+pdfPDF 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_off000119a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000131b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B7 18740 bytes
SHA-256: af80214fbd81009618773740fca9b79357ae56690d38a339c89ecfe3e5343b18
font_02_sfnt_off000162ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162AE 10812 bytes
SHA-256: dca94e52fba23dfdfdcedb20fae9757e5f9a278b853af0b9c4780d49b769c8f3

Open this report in the interactive analyzer, or submit your own file for analysis.