Malicious PDF — malware analysis report

Static analysis result for SHA-256 2baaf1d1c7202497…

MALICIOUS

PDF

79.5 KB Created: 2021-08-12 18:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: b6110ec4b1e0d2a570e33a6227ec7186 SHA-1: d60810e889d9a11636cb1ab7204b30dd79d20092 SHA-256: 2baaf1d1c7202497f6046d45962f3622c6e012a73acffd1d2b9db32108a19c9e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The file contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish for information. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://ucity69.com/clients/861769/File/29213967047.pdf In PDF document text
    • https://nikosdimos.gr/userfiles/file/64772011780.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/41010605842.pdfIn PDF document text
    • http://eko-uklid.com/files/file/42789720760.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/31706891629.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/69570892057.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160884dfab6c7a---1552248043.pdfIn PDF document text
    • http://phunggia.biz/userfiles/file/32125529193.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be3f6e624a4---bigidovizabonuvekaden.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/1017611406.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/kavarovutasilifebukagi.pdfIn PDF document text
    • https://akconta.com/uploads/files/95537757456.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/mmfu5dljd322ms7l9aei5prv0i/686722989.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/7a957368c5addb0e69ad08e2f601043b/55689144926.pdfIn PDF document text
    • http://tid.vn/upload/files/21952010795.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac70c101c87---93017455169.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607714e8533f9---boguruxonuwixulik.pdfIn PDF document text
    • https://mabuksusu.com/contents//files/53747345615.pdfIn PDF document text
    • http://www.hmh.sk/files/articles/file/xolimexopewasaf.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/op6nra5uv6jj7mjsiulvlih42r/50211083138.pdfIn PDF document text
    • http://greenld.com/userfiles/rifazekobarekozefuzusur.pdfIn PDF document text
    • https://www.twibiotech.com/plugin/ce1/ckfinder/userfiles/files/kagazupogozaweputo.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/441680d35ae328e7f7fef72e848ae2b0/20903316957.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a61eb1899de---82092547355.pdfIn PDF document text
    • https://avvocatoboretti.it/file/77149594006.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf333a486d1---sepeganegej.pdfIn PDF document text
    • http://web68s.com/upload/files/sixufodavowuraza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=subject+pronouns+spanish+worksheet+1+answersPDF 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_off0000d05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05F 17552 bytes
SHA-256: 269500d66ac6bcbdec9fafcfd9e2b45aa61830843baa0fcfe353c43a647e999c
font_01_sfnt_off0000fc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8A 11100 bytes
SHA-256: 8b26a7409174d0a539898f75ed0c2285b5785e064c5ee203dd04b9028ea0eab2
font_02_sfnt_off0001163c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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