Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc5fb5880538cc7f…

MALICIOUS

PDF

115.8 KB Created: 2021-06-23 20:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ed2bc73717a25499bf7bcc29ed2c3bea SHA-1: 52d08b1c5f25c9490adb19cc37ba75370df1c6b7 SHA-256: dc5fb5880538cc7f49c9cd73671ea47a93754901ff0a246cdc7f83bf0577e38c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It leverages a link farm hosted on compromised WordPress sites, presenting a deceptive download lure for 'Chalu ghadamodi 2020 in marathi pdf free download'. The embedded URLs suggest an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8810f5ab1a---55469284571.pdf In PDF document text
    • https://sinhadventure.com/uploads/file/vosemeku.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/c0eaj3ib7obocollmotu3nst4p/89012662418.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/pebugopomoribebubukikali.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/9849frph80q21r988gb12p3an5/talibex.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/fexutunaziwozuneroze.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/lorubobamevudu.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/245f482f879ae8aa9a0ba58bb95fa80d/25026616459.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607437fa173b4---3328085641.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d374d8b348---paxeriwudopuvafo.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c83a2215a78196fcd976992f24293254/21865884967.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16080cea07bcbe---kifuw.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/kajuxozerumadaxozalap.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3de9218e0---10958172324.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/gisoxasexabotuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=chalu+ghadamodi+2020+in+marathi+pdf+free+downloadPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B50 2868 bytes
SHA-256: ef0ff104ea44b4f76f2e317c05d944ff73adab4e11d451763276b796cfc564ed
font_01_sfnt_off00012582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12582 5548 bytes
SHA-256: be9aa1124172a1e809b38b039a31321d33db3a4d810504e4ad7a1713698bada3
font_02_sfnt_off00013851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13851 10720 bytes
SHA-256: d98872a085617a6688ee2dced054b56d68dfd3fcd3df2f5e62e42d652b92d052
font_03_sfnt_off00015cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CD9 16068 bytes
SHA-256: 89247d3646e3773572243f1d4b0449240b5d7bcbc9865045ac28c7845acd9c8f
font_04_sfnt_off00017176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17176 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
font_05_sfnt_off00017f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F77 22160 bytes
SHA-256: ac3844fef90cf95b192631e48f3bc37a925831ba67473b7fb83eba10712ee5e7

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