Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7bd295470b0a2dd…

MALICIOUS

PDF

87.8 KB Created: 2021-09-06 00:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 421c2a648c2966e6f11ab77317c76dee SHA-1: 594110bbb4244129f288680c811db059adf0e69b SHA-256: d7bd295470b0a2dd99ed9ac8d61fc0ac908baf520ef987669bd79d8068c8b453
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to distribute further malicious content or phish users. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://cascinamana.it/userfiles/file/gerafijodakekav.pdf In PDF document text
    • http://mppscstudy.com/admin/usercontent/file/66259811373.pdfIn PDF document text
    • https://restavracia02.com/userfiles/file/rikeweborez.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/72316364050.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dad098015f---wurupoxoziwefemafeladi.pdfIn PDF document text
    • http://pensacolahigh1964.com/clients/1/1d/1d652d7f5bd5fd2f3712913460b20393/File/10123655282.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/7a7b0e90742a052d4ffb82ea11ebca7d/64382274795.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/3688997758.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/fabuvi.pdfIn PDF document text
    • https://4cmedica.com/ficheiros_upload/file/jokenogajudag.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/widejob.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b753e80959---47810186371.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b4c76f55f---taxenobavipokafidimosimix.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/124cc7fac638999464307208e0d93cba/51087151592.pdfIn PDF document text
    • https://redac.ch/upload/41195738594.pdfIn PDF document text
    • http://maplewoodmachine.com/clients/1/17/17f0ea2532424b9b8bf99baf53cd3763/File/42672229480.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160806b905333d---63548663198.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/87179056711.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/wuweb.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/f869fc3bc6ce5d3b32cc4342289cdc56/rosazu.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/jekavobivedod.pdfIn PDF document text
    • http://89928386.com/uploads//files/202108041927587908.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/rikevagesiruzajonumevatu.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/27867133071.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=download+buku+etika+bisnis+islam+pdfPDF 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_off0000f11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11E 18120 bytes
SHA-256: d25748c5cfbcbc0bea5d23337efbda40e1104018f9482b8cbe5a9c4c37dccee9
font_01_sfnt_off00012083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12083 10976 bytes
SHA-256: a68dc3bda8912b3d0345ae46266e856d589932ab8510bb1280b6d9cf23e97d74
font_02_sfnt_off000139d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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