Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c2fcb771c3ab19…

MALICIOUS

PDF

90.2 KB Created: 2021-07-21 23:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f4ed3eb49844a7e4885bb47512b4da8f SHA-1: 8a6aad495a870db953f68e872b8d209c25cf592c SHA-256: e9c2fcb771c3ab19f443ed8e4d59fa59e46c806ec6987892396fc4e108f318c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised CMS upload directories. These links likely serve as lures to phishing sites or malware downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/61r88vfum3l677sot3elhleodv/25652308803.pdf In PDF document text
    • http://makesomenoise.hu/upload/file/vusedovunum.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a18d123e595---nugakomo.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa16887c23b---8988374161.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/20528968101.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/waxorazovek.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/26178421727.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe6e822055---mobaban.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/70b23a95ac0fea11e5d7cb931e304153/6929906061.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e565e62adfd---24237122587.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/wogokupowufuzorusilap.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/jonefikiz.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/74571657754.pdfIn PDF document text
    • http://cokhisah.com/webroot/img/files/45315428271.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e6b5fd92605---garawidavubani.pdfIn PDF document text
    • http://wasserburg.pl/userfiles/file/fagebilavago.pdfIn PDF document text
    • https://bataretak.com/img/files/file/42785244726.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/hhe2udr6likt2gbqk81v2jgoha/jepomejisu.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/rukivajekiku.pdfIn PDF document text
    • http://richardchong.com/userfiles/files/70648007929.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/3593ae0b9ee377479c432f6147bca135/87040185461.pdfIn PDF document text
    • http://thesetnews.com/images/fckeditor/file/25234971025.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=what+is+export+lcPDF 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_off0000fcc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000114d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D7 17528 bytes
SHA-256: c013248322dff6e5a89aaa0477d9a6a5f70aabb109cd1d6c1fa7e511a4dfd4dc
font_02_sfnt_off000142dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142DC 10460 bytes
SHA-256: 1413d6d1e17a9c6fbf4f157b8ac1dc0d18bffb9c3926e8f1cac21e7c36b30ab2

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