Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04212148d64e8c2…

MALICIOUS

PDF

89.0 KB Created: 2021-08-16 12:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4bfdd2b5512d5753d1af0c247a548593 SHA-1: bf6a6e58d196a6802e94d2147f5b463207ca81f4 SHA-256: d04212148d64e8c25ab942afc29bf36829dd517d391b6d47d4788cb51cf7c69c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories, suggesting an attempt to lure users to external sites. While no scripts were directly extracted, the presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://ailani.org/wp-content/plugins/super-forms/uploads/php/files/83d83bae5c3aacbbca1c6ec67796b816/fowojaweluxokusobof.pdf In PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16097c2641f6b3---ririwavifazogexobulunefe.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/86147344873.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d77d2489688---64106898348.pdfIn PDF document text
    • http://22743333.com/userfiles/files/tiwesu.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/91236886136.pdfIn PDF document text
    • http://mytaylormadefamilyusa.com/clients/864113/File/64570771208.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/16b1d3dd38986be33dbbd5a6590e15e1/tesiboponunigosi.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160958034adbe6---5087202360.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/86851183914.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/5e0ofqu6jmdf89b5sdsg967rq3/43914562846.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/75219147315.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ec8a39aa5---ronarikeluga.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de5a6ebfb98---33191015302.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/58697003330.pdfIn PDF document text
    • http://studioingegneramato.com/userfiles/files/pebaniverazinelomi.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/c9b9b2c7b2bg158mjtm77tdn6k/47597937608.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/50d6a04e4b11bb6abf04da0dc8386cc8/sivajo.pdfIn PDF document text
    • http://tlproduct.com/userfiles/file/sexatilani.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607630baee0c3---welefusepuzajitine.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608231fcedb02---nebegasevad.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/cc178d0a050c53e81cea28e3b38fafa8/15553356829.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/tudimoven.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160cdde68efab8---lakurakunixisaviwaxi.pdfIn PDF document text
    • http://cn-noah.com/uploadfile/file/dixugipawodet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=plants+vs+zombies+para+pc+full+espa%C3%B1ol+1+linkPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/5f8f615a2e306bcddd11782c2acf28f2/60499510719.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE826 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001003d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003D 11356 bytes
SHA-256: 5cf193289e5bd3f7da3e9e4de9eedcd36a97c16d8d21940efb5b61b05c25f088
font_02_sfnt_off00011aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA2 1952 bytes
SHA-256: 47b3c42150b77a9b63b02fefd0d29d662123308405488c5ea617aa1ed6bbbf7f
font_03_sfnt_off00012379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12379 18304 bytes
SHA-256: 1968d6992428cfd8eca11ef4122384db9ceca3fb6bfbc2d7b7ec06155552add2