Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf0edbf3563be93…

MALICIOUS

PDF

80.0 KB Created: 2021-09-16 23:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ca1c80bb8bb3984d6cd7969b5407cdb6 SHA-1: 6e413b759da5ed95804c771eabc62b269c9a2ecf SHA-256: faf0edbf3563be936147ecc8e62651c644987499a10f0d6fd522395a3ef9ed2c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs indicates a broad distribution effort, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://gesundimjob.at/images/content/files/92622186957.pdf In PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/pm04duo7fjahd3jshdts7k8daj/20805413579.pdfIn PDF document text
    • http://sungder.com/upload/mijopodeza.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/ziredesigus.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/12547722648.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161392231a722c---15850555386.pdfIn PDF document text
    • https://discovercefalu.com/_data/images/file/61446814582.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/pujasoramomomawekixivubij.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/dd2dfb3dc54214aa177866b8a47c5024/75358751056.pdfIn PDF document text
    • http://covina.crazyrockinsushi.com/uploads/files/10783199083.pdfIn PDF document text
    • https://www.whoamiandwhyamihere.com/ckfinder/userfiles/files/40877468931.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/tawumoroxamuxenobipuwamuk.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/vimevitipube.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210902232842.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/1646a8159ad70f03027ae57a59daf7ac/zatotetibotomimedetunu.pdfIn PDF document text
    • http://hstairan.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/61262145563.pdfIn PDF document text
    • http://spbmedaks.ru/sites/default/files/uploads/movunefer.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/35489587629.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/25520012088.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/d37s48g1ova687sonvogc3mjgn/dipuvadifefo.pdfIn PDF document text
    • https://slide-bearing.com/d/files/nowevefumedono.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/84894112730.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/11244642286.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16141cfca10239---69897396475.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=cambiar+numero+whatsapp+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_off0000d346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD346 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5D 10968 bytes
SHA-256: 3ae57fb0f25954783246cbbda75fb2a29dfd39b9e3a76e3bd123b28d4434c0aa
font_02_sfnt_off00010473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10473 17888 bytes
SHA-256: 17504834229633686739b37b5abd72e09f95f9a36c4ff3252729ab7d668ce9e6

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