Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d973f9a26635867…

MALICIOUS

PDF

83.3 KB Created: 2021-08-20 08:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c09736cfafbb8f27eb7ab1a39126e79b SHA-1: d9517dc3f0d0dca08998e4431a02d3f1982e4fac SHA-256: 2d973f9a26635867050f115834924af0eee30436425635bd68bf2228387465e4
204 Risk Score

Malware Insights

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

This PDF file exhibits multiple indicators of malicious activity, including links to compromised WordPress sites and a high ML classifier score. The presence of a visual download button suggests a lure to trick users into downloading further malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://parkhigh65.com/clients/4970/File/pikoradejenubogetajafi.pdf In PDF document text
    • http://meble-tk.pl/userfiles/file/11637989651.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf22bf2085---18452907396.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53069906e4---sufumorir.pdfIn PDF document text
    • http://tilestone-pools.com/i/File/wusafaverekiviperesa.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/69b05c82fa080ad9a8c8ebbc54572bcd/3618955398.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/qis784bmhdb9ff0f9kqgsdjte1/73040478620.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/6c3tf6r82r2goraqslgcmggo41/87784184478.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081d33c6a5b8---77167940258.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/58465054752.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/jakajexa.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/megonolazutex.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9086f1c60a---diwakufudifuvotuvidu.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/luvod.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/88b2b80ffa160973bd39670caeea19a8/rojiso.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/17808020645.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ac379be4317d9d12c7b1bc5299c7c433/zepukitaxina.pdfIn PDF document text
    • https://panificiopasticceriabattaglia.it/file/32623206080.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/16647347332.pdfIn PDF document text
    • http://drtamerturan.com/file/gibizelowo.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/84466894557.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/9d9d599dd97a84e5ef15427a7c6c4519/wukafowujumatavupomanuxi.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/vulup.pdfIn PDF document text
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070334382ad8---loraneteberodutot.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/89020661703.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=oxford+school+atlas+map+book+pdf+download+in+hindiPDF 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_off0000de66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF678 17204 bytes
SHA-256: 546da27e84d3cdb4805454f7990f4e0dd699b170195958583123b5215171722b
font_02_sfnt_off00012365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12365 11196 bytes
SHA-256: c0a793da0f3dbbf5a4e8ece39fc47cda4d9d1944c85c3d8f6bef60362f5b2829

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