Malicious PDF — malware analysis report

Static analysis result for SHA-256 f32678e0357edd90…

MALICIOUS

PDF

77.6 KB Created: 2021-08-17 20:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 05c4751c00037ee9cbb1bbc5147c9efb SHA-1: b9a875765ba9ceae56c8601dc4a80fa54ff175d7 SHA-256: f32678e0357edd9066fdc934e3a2ba80115b271b32abc19b81209fe98fa68695
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://philabc.ru/uplcv?utm_term=somebody+anybody+something+anything+somewhere+anywhere+exercises+pdf PDF link annotation
    • http://lindendirect.com/ckfinder/userfiles/files/2219046550.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/3890009805.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/k7v1cla6ag4j0l6uhr595ahll2/sewamuxuzelanevinudugez.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607886c5a39b3---rikufofikevesi.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105292150a97---74907679344.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf47bef94e---zilirapemugoz.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/7935010449.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f770b9c7050---70919930009.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-8-6/20210806094724201408.pdfIn PDF document text
    • http://labuchedeberce.fr/userfiles/file/muvesaniwarozup.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/laxuduwutuzozidapumuxo.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae2c6e978c---73357199447.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/00ef9b586822fb4033f5c1e03bc5c686/13008836179.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/nuzagopitaluda.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/5f25d2e5d71b178d21399df80ad4faf8/tadojuxudagufo.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/79011427085.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/7tb206v9uf86vp08fmuchbk9ug/88994224288.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//tifefipafebabebakuxe.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/sitibudaledemenaga.pdfIn PDF document text
    • https://dolcezzecaffe.it/file/60723006436.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/m9k9e2ben2s1s86mqrhu7piuj6/morej.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/4b91c81f54f5f55fb210727b45041f7f/28154827733.pdfIn PDF document text
    • 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_off0000ca1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE232 11540 bytes
SHA-256: 085dee6d25a9d506674df22ec2fd4ab7f0945d991abe5a87e69b7323f542f263
font_02_sfnt_off0000fd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD07 16836 bytes
SHA-256: 0258efeac53a9c8bf21c931297bcc252b590b928f54cea7d918eed9fb7575542

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