Malicious PDF — malware analysis report

Static analysis result for SHA-256 624ade8881efa2aa…

MALICIOUS

PDF

82.2 KB Created: 2021-09-18 23:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f5546671e540c2d1d21aa18adb9c159c SHA-1: 2601da6cfa56277aba2ab8d70724f3f603dcccfb SHA-256: 624ade8881efa2aa1bf940ee4c771589fe4e085ce8a85b6e3aa43350422c905f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous domains, many of which are hosted on compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://t-groupvnxkld.com/uploads/news_file/26666642357.pdf In PDF document text
    • https://portalbime.com/UploadedFiles/New/file/41880091898.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/55522462455.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/d1e4dd71b25948f21bb4738d54bee9b2/82010526688.pdfIn PDF document text
    • http://dkstores.gr/userfiles/file/sopigekurobifun.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16134a26ec4fa9---kadazoduzuwijobara.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1613f146aa4e2f---jefurivegobuxegivizatoxe.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/96085829244.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/1752906281.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/aniposawu.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/mafutofuwagexot.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/cb41afde3b9034e86dba16f783aaebb4/38499254855.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/vesoketadalifa.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16140af98ae259---xuvasulebugowoze.pdfIn PDF document text
    • https://eetravel.net/file/15757346812.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e3a0e3d23---zesag.pdfIn PDF document text
    • http://telecycling.org/files/file/vedufokavugus.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/11621513384.pdfIn PDF document text
    • https://redac.ch/upload/nuwixojewovum.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/42742447430.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/17020322529.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a43ac02af---1105968855.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/65157247311.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=emoji+para+whatsapp+android+gratisPDF 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_off0000d9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BB 10860 bytes
SHA-256: c147c13402f323cfb0604abfba70712ac09285d44425645dace4aae9d6fb8b33
font_01_sfnt_off0000f260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF260 18520 bytes
SHA-256: 321c7c388615acf2f041128a6b566e495743f3a94e3a21f9a375d9ae9f664464
font_02_sfnt_off000122af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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