Malicious PDF — malware analysis report

Static analysis result for SHA-256 292344af47fb4fec…

MALICIOUS

PDF

81.1 KB Created: 2021-08-30 12:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 34e27f770b2a67bce064442ef5abfca3 SHA-1: d05e53ec84cf326ac9265a8b9f349e1b6db399f2 SHA-256: 292344af47fb4fecc0d3472c3c6d7383d4fe236c46e11ee19208147da346f13c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many hosted on compromised or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://faxik.ru/ckfinder/userfiles/files/nezufevovimifiginoxi.pdf In PDF document text
    • http://fouladsazanco.com/Upload/file/14293793396.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b8ae18c66---duroguguvenoguwani.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/62432976059.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/77454036313.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab69337a85---346247864.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/ruliwavulejaj.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/96954773103.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/jopukijej.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/3029249730.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b2581e08f74---95496043274.pdfIn PDF document text
    • http://happy-land.hu/editor_up/44093806021.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/d14ec20c380306cb1182ac1b2a88b318/lagunomosojitotovibex.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/13599948158.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4743c6ead8---34338540954.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074200dd6a3f---38105335437.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/rqrbde7cfm4pmbvoml4m5mr927/vujubusatuxosivovoj.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/o8qetfg312vdm6r8tb3qf7keqk/posawabubeloxajaxo.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/asqcdtbppl7fnl1u5h8u9dt0qs/74749783839.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/juretodutezususewebuzabo.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d0dbb6c799---30717144586.pdfIn PDF document text
    • http://deccanquest.com/konadnew/userfiles/file/firajugopomotuvofogo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=wetter+on+linePDF 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_off0000d833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD833 18908 bytes
SHA-256: 2fd5f38e0327b17a9fc78832e7da0ef16c4b394622b8199477722b5d5bba3141
font_01_sfnt_off0001094a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094A 9764 bytes
SHA-256: 43d18905ae95e9d7485d92082e291c3116d6137d7c9668b99d3863c1cbcec3f1
font_02_sfnt_off00011eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1