Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e1bfd648ed4862…

MALICIOUS

PDF

189.7 KB Created: 2021-07-06 06:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f1c143568e3ba0f5ef31f6dff2a3c030 SHA-1: fe82e8cf57ff8558d2d0440d8415f64849109c13 SHA-256: 69e1bfd648ed4862ca242990686f40a890169ef44e7e3ff3157954050e34ad70
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. While no scripts were explicitly extracted, the structure and heuristic firings suggest an attempt to lure users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9083

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dichvugiayphep.net/hinhanh_fckeditor/file/nuwidarekorur.pdf In PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/ea7692f5e728ace04ea90e3e50d539ef/kaxatuxapifasod.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/c2c9b1b7c158821d91ead73a7904dded/45347311491.pdfIn PDF document text
    • http://vtaky.sk/media/file/80271137588.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160849b4f5d39d---58248867256.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/tijezibanik.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079be8d698ea---tanuzumil.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7600b3032---jukanenibanekow.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/wobalaxulipe.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/7f92266012c51dcca29ef193abf8ab46/pexutajojikim.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/129a01c820441c7cde81cc46fd756c85/mupefeneme.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/36770983954.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/2a4cadba406848106b00dde246319fb4/tokufe.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/sololasivarogomajiwof.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/88f2fcdf45092fc669b68279f735021c/busajofodopodor.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/b2f0b60f6685a9f7066cb5cf222395f1/11450355398.pdfIn PDF document text
    • http://zerosquareonline.com/file/9303247295.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/noxuviwebalirodapax.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083811683df2---bafazinanijaxax.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/7ese13747fqqqgf4t5l006rr55/bovotori.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/fixovifoligiminimori.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7817edc34---93444584242.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/vixinitemebakewu.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/dupugubuxojemixufukifafi.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/50793837350.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=definition+for+self+righteousPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0002a21a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A21A 39292 bytes
SHA-256: 8ce7887eb05ec9e6702b620c5d623173f9dc16b1d94f20aec1dbe22345bd1b96
font_00_sfnt_off0001c396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C396 41356 bytes
SHA-256: d0ce099c8b52acd76ef48e4524aa40faa78886088da0917226924804e388cdec
font_01_sfnt_off000218e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x218E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000230fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x230FA 10432 bytes
SHA-256: ba02d73c30c2252eec23e0957fbb837a63d44bb277cbd11b789bf59bb0114df1
font_03_sfnt_off00024889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24889 32096 bytes
SHA-256: 94d4e4b864b521073dabe7d491fbd93431541591d40c3fd67057ea73501523b1

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