Malicious PDF — malware analysis report

Static analysis result for SHA-256 5734f6c9d7f45b0f…

MALICIOUS

PDF

80.6 KB Created: 2021-09-07 19:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ec2e7591a28ea56f55eff933f8644155 SHA-1: 3e17525af31ca15d69c9cc8a37b347589ccdd538 SHA-256: 5734f6c9d7f45b0fbd4d2b64e297634d2a997f87d8ea1d1d1ec0d87289a0dbc2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised CMS uploads or disposable domains. The presence of multiple links to potentially malicious content indicates an intent to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://vishwkarmaenterprises.com/webroot/img/userfiles/files/lasukanaxelidakavume.pdf In PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/86166064102.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/26510024008.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/01f6995f963747e572f3cd732b6b77a9/13462576912.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608335a1954ee---1954479390.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/muspso9ibgbc5ou9grs63dd9tv/fedagil.pdfIn PDF document text
    • http://stagegator.scorchmark.com/stagegator/ckfinder/userfiles/files/79153693664.pdfIn PDF document text
    • https://happycolaborativo.com/uploads/files/57307989419.pdfIn PDF document text
    • https://orangerun.re/photo/files/xugosiliboxo.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/f036f4b2dc7c40f58087ca26527b7360/25574818894.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/db0f830267a26c858e3fd229ad2bf8b2/fisidojavig.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121a14e48684---16425123315.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3394b11d2---62640073123.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/61577318662.pdfIn PDF document text
    • http://land89.com/ckupload/files/wikekivatuvo.pdfIn PDF document text
    • http://infunplastic.com/d/files/14530667755.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/loligorodi.pdfIn PDF document text
    • http://citra.cl/userfiles/file/55286300274.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/14130359152.pdfIn PDF document text
    • http://ketoanantamhcm.com/uploads/files/gikexanemod.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/37928963045.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160964c7a03654---62079386531.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/777a9d609d7af832e3a878e0fd383302/gozisujarojixez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=cara+edit+file+pdf+di+wps+office+androidPDF 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_off0000d18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A1 10728 bytes
SHA-256: 5342459016b3d250e7f2dfc97f57a800cc375cfca31280e2802e16df43633e01
font_02_sfnt_off0001026c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026C 19276 bytes
SHA-256: f88c195d707fa2b480969b3fc282c05376ae324b6e35884d145236c69970436e

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