Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fc94174ca709b4…

MALICIOUS

PDF

69.9 KB Created: 2021-09-15 09:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 704364c0bb00034eb43ee831f4229427 SHA-1: 36978c7b633e001be1eb6ecac5366f4c4736cb01 SHA-256: 48fc94174ca709b4c5d757efab307f71995bc392d719faf666cf34713ad0bd2d
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external websites, many of which are hosted on disposable domains or compromised CMS upload directories, indicating a link farm designed to lead users to malicious content. ClamAV and ML classifiers strongly indicate maliciousness, consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://sgd42.ru/userfiles/file/22660694927.pdf In PDF document text
    • https://terracell.pt/images/file/69396840492.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16135cae83340d---38082116089.pdfIn PDF document text
    • https://designclarf.it/file/kudipe.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/25902459426.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/35118470586.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/7knnrp4v1s39o713d1on0q1dc3/36643355457.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210908135443.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/77218706416.pdfIn PDF document text
    • http://khocabien.com/uploads/files/sekebi.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/285a282c7d2e86b56113d2afc7a379bd/jiledinikobasedif.pdfIn PDF document text
    • https://kaptenhoki.com/contents/files/dakijufuvijiwew.pdfIn PDF document text
    • http://terralis.net/catalogue_dynamique/file/7892353178.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/50ta9kfeho2bgoop35593adeqe/61965988647.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/32127759232.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/afbmjnkbufksc34f1nrti9dtra/seburorut.pdfIn PDF document text
    • https://rumahbaruku.com/contents/files/42567831218.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/magumukes.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9474b3405---furosesozud.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161411996644de---46587189984.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/selajewidadumal.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/31355688777.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16133d31c75936---tebowudefopotoz.pdfIn PDF document text
    • https://architektor.ru/uploads/file/12877405248.pdfIn PDF document text
    • https://whatproperty.ng/ckfinder/userfiles/files/zomipitogijimetejakogel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=legally+blonde+jr+soundtrackPDF 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_off0000b19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB19F 15120 bytes
SHA-256: 22a3a1771674a8b8d34246a9312e598adedce2486d8a8b56d8c533d455775fd0
font_01_sfnt_off0000d82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82D 10984 bytes
SHA-256: 082721740bcc3518d51bebb30045beab83ce31f235fba2c0c04f18600047f2b7
font_02_sfnt_off0000f1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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