Malicious PDF — malware analysis report

Static analysis result for SHA-256 5893e16e70beccc1…

MALICIOUS

PDF

75.1 KB Created: 2021-09-30 21:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0037ae724413c4d38aef3f7a6f494114 SHA-1: cc0e554239705ed2e6b9b39cc4216b9712f44a0a SHA-256: 5893e16e70beccc1862ec59ae6c65f14747e4352ed885b60d733d4bbe08f1463
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised CMS upload storage or disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://smidgel.ru/uplcv?utm_term=watch+twilight+online+fmovies PDF link annotation
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/49746471897.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/16152400781.pdfIn PDF document text
    • https://knoxvilleremembers.com/media/60836445670.pdfIn PDF document text
    • http://themetamorphoseprogram.com/userfiles/file/15541959729.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16152cb3534e50---26347023609.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/21349849374.pdfIn PDF document text
    • http://cy2hand.com/userfiles/82929940937.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/xapefupivunomukedawunu.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613460fd466a2---60007646209.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/latumatumonebaf.pdfIn PDF document text
    • http://ambulatorioveterinariopisillibertozzi.eu/userfiles/files/13374112190.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147464a18834---63827053297.pdfIn PDF document text
    • http://netichikawaya.com/userfiles/file/nomegaxokipatitumis.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/55994792973.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/jevigovizowudoxawu.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/rikunigoxuzog.pdfIn PDF document text
    • http://irfanmakina.com/depo/sayfaresim/file/wajavelanulobukagunagavun.pdfIn PDF document text
    • https://0900107678.com/upload/file/sasemilivikemitijodinefil.pdfIn PDF document text
    • http://suriyedostlukdernegi.org/image/files/48781205832.pdfIn PDF document text
    • http://nagakuratrading.com/js/upload/files/gakanonirejivojo.pdfIn PDF document text
    • http://www.slenderclub.cz/ckfinder/userfiles/files/7886485338.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210924222733048.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/161523de14e2ea---68291204080.pdfIn PDF document text
    • 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_off0000bd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD32 10828 bytes
SHA-256: 8706acc001bcfd2e30db4adac2ea65de83659a9c21b28214ad0df737bf8ef304
font_01_sfnt_off0000d618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD618 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2A 18812 bytes
SHA-256: f427f6d33a552ea5e1534313fa118f7d497901dfa0b13535c736b7f2e065eaea

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