Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d442b6a224d73b5…

MALICIOUS

PDF

82.2 KB Created: 2021-09-07 12:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: aa6e3da165cd93d1c6fe77b0abe75b9f SHA-1: 5760b0d79b6f39f604b7d6123882df2ee3bbc919 SHA-256: 7d442b6a224d73b5682a7b3b6081b8c6381a5314301149bcfdc1a2f473c87ffa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://plentis.eu/ckfinder/userfiles/files/nojuzagasagugazolegowi.pdf In PDF document text
    • http://woodbridgeabw.com/uploads/files/movoxosejefisolol.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/aa0de0c7dca3cef824889bf43882a092/nosunibepunewopepej.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/53180284651.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c6101605c---55433649938.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/74dq6d5b89oj41mfsgs7ltb3ja/kulogazetetidumi.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/detuzesawovum.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/utmlmhjp52unsgjpb5n8fdfuj3/62761491888.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/95046904068.pdfIn PDF document text
    • http://palletgoanloi.com/img-dn/files/duratoperu.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/06/19/file/zizuta.pdfIn PDF document text
    • https://jin-ji.com/upload/files/39969809687.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/18569939723.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/kawotaponegatozegerigi.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16098bcc554211---momuxuxojipunuxebow.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/45688879.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/tumetunemulesejosude.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160889c919f0f8---sobazuv.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/da0c46bd5e18af507585a194431a96b2/98667749380.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/c02d6b5a7f7b597e38aaea14f856e3ef/24595922246.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160cf32988c3e8---jepobukezo.pdfIn PDF document text
    • http://strandedtattoo.com/file/29693442328.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=rules+of+basketball+in+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_off0000dd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF576 17532 bytes
SHA-256: 530da38be37ae495a6292ab0c327aa245912d5e97859ad894a28b95b6143a45b
font_02_sfnt_off0001229f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229F 10768 bytes
SHA-256: c5643e14658ccd4fc2a1316266916359e96386d6c3afe2446d0baf2f9bc54607

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