Malicious PDF — malware analysis report

Static analysis result for SHA-256 388cb29b62644064…

MALICIOUS

PDF

74.6 KB Created: 2021-09-01 03:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7dc4b59d6290b6bbc14bba285de905a9 SHA-1: a1eb0198137bfd886954c3c049cfe1be3390f428 SHA-256: 388cb29b626440644219d55d20ded19079b4a544f54ba0ff34a22000156820c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to websites, many of which are hosted on compromised CMS platforms. The presence of these links suggests an attempt to lure users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/97ec6a5a096f2b299bd265f58e185dad/wijogelugineje.pdf In PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/0b0e7c29937db7898a329f20fbd5b7c7/47937163726.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/a3126073f97240b2d0a93c67e95f3524/15862293860.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16077178f075cb---jajejijaxujuf.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/82855305890.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160797f839c78b---bufuz.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/54520880473.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/8863fe69b1d813f0142637e2ea608dfd/toteviwofemufosazozexapix.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/nekuva.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983e606019d---nosoxagefoxalirufa.pdfIn PDF document text
    • https://seerupit.dk/assens/file/letaniwigetiwafevij.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609957a24048c---wesagesogok.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea873de584---59900584813.pdfIn PDF document text
    • http://mundialimportweb.com/userfiles/file/tidozirajareposimuj.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/93914744700.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/fitebidupozulobabog.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/rakepewudevitigu.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/42d0df74cbbdb1b902230542e1bfb4c2/detizaliruwolerokipefozi.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804063bd0e5---detakidejidakalijut.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/p8hjdva4qgunglm0uti7v0u6ds/bomixawe.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/76621027328.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d64b6d93a66---42000754575.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=360+usd+to+audPDF 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_off0000c2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B3 16404 bytes
SHA-256: b34f035d14ec83f20b3bcb9a97be5f856040f52b71bdb1e7d285f38b56e7956a
font_01_sfnt_off0000ece5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE5 10232 bytes
SHA-256: b002a61cca91496c80c9a1017c5bd3e5b18d6cff87f38cb763d85993f750ae95
font_02_sfnt_off00010400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10400 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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