Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5bb3faa290b8cc5…

MALICIOUS

PDF

119.8 KB Created: 2021-09-07 05:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 30d59a5735b7b775b36795ab5b14ab0f SHA-1: daaebf32a0aa608ef09b2eeae65df55214bcd92b SHA-256: e5bb3faa290b8cc5691da1ff2f649a575f1e6416962b77830ddcf6858d8629cd
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains, likely intended to lure users into downloading further malicious content or submitting sensitive information. The PDF's structure and the nature of the embedded links strongly suggest it is part of a phishing campaign.

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://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/2ip5p0s9bo27lothm0n0hh2gks/95954989961.pdf In PDF document text
    • http://ehs1958.org/clients/73155/File/sajufewolaxosan.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/25004162142.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/47680989898.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/4fb1af80fc7098e9c2a8e39d37992e59/7698332701.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/0uchi5unuan1cnimnfe2n2itdc/pisupugixasaguxev.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/5a92bba5e551d3ee91ad1180f45cbb5f/20571836578.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/e8h6jieo8ndkvvlbunhvu678jf/jepilivimi.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/jatamamax.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/99914873942.pdfIn PDF document text
    • http://didula.com/img/file/91722561539.pdfIn PDF document text
    • http://djpress.pl/Image/files/41181370650.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/49398173843.pdfIn PDF document text
    • http://christopherdallo.com/file/84164668093.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/047e5def8e65ee7030c047af9c38aad0/41662648671.pdfIn PDF document text
    • http://soflcops.com/clients/83267/File/92723129840.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/tetomopabodona.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/duwarigesujazataki.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce62725b52---44809360305.pdfIn PDF document text
    • http://paletydozahrady.cz/ckfinder/userfiles/files/41640971670.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/pidixo.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c70403f83---dewitij.pdfIn PDF document text
    • http://a1climbing.com/userfiles/files/60616297832.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=simplifying+radicals+worksheet+puzzlePDF 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_off00016d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D14 18432 bytes
SHA-256: 4312be4b5621226e8584112b64f073fc7827aa435a00b4a95fcba6fca690163d
font_01_sfnt_off00019dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001b5d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5D8 11596 bytes
SHA-256: a1e765f296b60cb95d46ce95a4ad50cb7ef1aa76b8d24ebf879a34220a16c046

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