Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabe2693d2ee9b7a…

MALICIOUS

PDF

70.7 KB Created: 2021-07-18 09:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0f6e1346589b71b019f6b36c0d286158 SHA-1: 598662c6cc08256fc59d5e2ec1093ea8d669fa3f SHA-256: fabe2693d2ee9b7a65e06ad95ec6186defda2c6a0fde5bbb1ba5a534aae5e13b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to multiple compromised CMS upload directories, a common technique for hosting malicious content. ClamAV detected this as Pdf.Phishing.Trojan, and the ML classifier also flagged it as malicious. The embedded URLs suggest an attempt to lure users to potentially malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e44dbcb7538---47114356378.pdf In PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/28328356335.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160841cf64f4cc---baxavumumalotinavegajemak.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/81254449879.pdfIn PDF document text
    • https://2acontractor.it/images/file/46640377664.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/48649557038.pdfIn PDF document text
    • https://classicandcamper.co.uk/wp-content/plugins/super-forms/uploads/php/files/sp5jv1e6d3esq1pgnen2oh2vfd/kezepabetusi.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///60986500200.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8135b2bb6---tosumiguwusu.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/s58m3855ocstedjo2omgdjijbd/16122362259.pdfIn PDF document text
    • http://f27szerviz.hu/upload/files/rosepipafotisuvipejebuj.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/9d9438ab062a6e2eb9f198dcbba86b83/57468496229.pdfIn PDF document text
    • http://sankofalectureseries.com/clients/a/ae/ae3037074ff26ae8502dacd236f4ced8/File/84053876896.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/sizoletofate.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff954b8b0a---47629621794.pdfIn PDF document text
    • https://mmszke.hu/files/file/16115347592.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/f728909edb5ea613c594575583b75ee8/pesejigaveluwetegotanegol.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/pukorumesilo.pdfIn PDF document text
    • https://diphong.com/uploads/63114812801.pdfIn PDF document text
    • https://fibra-optica.ro/ckfinder/userfiles/files/58566581913.pdfIn PDF document text
    • https://tomas-music.com/contents//files/4298782821.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac269eda268---47586095605.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=fornicator+meaning+in+teluguPDF 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_off0000b3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3A4 10480 bytes
SHA-256: ba9df79ed26f4dc71b2e7e419057747286a1414edcb7bdbcb41a68ab95d6e656
font_01_sfnt_off0000cb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE381 16456 bytes
SHA-256: b749d3d7520b179d9b90c7ddae4e55fb6b375a3c9140b42e0f544cacca1716b9

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