Malicious PDF — malware analysis report

Static analysis result for SHA-256 80edaf797ff52996…

MALICIOUS

PDF

79.9 KB Created: 2021-09-25 13:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 58d2d97f8de47732b29b642e02f32d4d SHA-1: f49568a722f81a1cfb0e0da4ce6a0c788b22e3e4 SHA-256: 80edaf797ff529960b87ce19594ea54426dad922e48a2c7a0cd07e4cabcdbae5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs, some hosted on potentially compromised or disposable domains. The presence of embedded URLs and the nature of the heuristics suggest an attempt to lure users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://carpenterstouchnj.supremeroi.com/FCKeditor/file/6160687032.pdf In PDF document text
    • http://sewakendragroup.com/userfiles/file/42445266545.pdfIn PDF document text
    • https://svilia.restavracia02.com/userfiles/file/38310622692.pdfIn PDF document text
    • http://ibarugi.com/fckeditor/userfiles/file/jutovifumurexar.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/161462a749da40---56695468186.pdfIn PDF document text
    • https://cobaltinc.org/userfiles/file/90686107343.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210918_FB946A5750CB5172.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/gifokubemapakaroxa.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/7419017025.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/wufepisorovujate.pdfIn PDF document text
    • http://7profi.net/userfiles/file/jurikibupodomoxa.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/14008440620.pdfIn PDF document text
    • http://zoo-foto.cz/userfiles/file/zozona.pdfIn PDF document text
    • https://italvaping.com/file/11152812407.pdfIn PDF document text
    • http://guidesdugrandlarge.fr/images/import/file/tesapuwaxitupa.pdfIn PDF document text
    • https://mb-classic-service.de/userfiles/file/47267224928.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/zokaxudadawafek.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/bupijuzazebimedujuvo.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16134c210e2e80---19749652510.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138dd400efc7---11131404945.pdfIn PDF document text
    • http://kolbiko.com/images/uploads/file/26037154362.pdfIn PDF document text
    • http://chromavials.com/d/files/woxalamufofap.pdfIn PDF document text
    • http://finance-bulldog.cz/UserFiles/File/pukajobuxinijenovox.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161474eb17efa8---xutamumebetifibali.pdfIn PDF document text
    • https://istanajp.com/contents/files/gometagevusepixuzuloroxep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=game+luy%E1%BB%87n+lv+offline+cho+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD1 19300 bytes
SHA-256: b45deab5cbcec834aa6146cfa286da5272e837885c8c68145cffcd66d5c4d7b6
font_02_sfnt_off0001003e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003E 11000 bytes
SHA-256: e9a612fbf83b96284dd49ecdc6bca01d0f4d5252e1befc446e5acd22bb174a41
font_03_sfnt_off00011944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11944 16188 bytes
SHA-256: 800554d3d6320da9c8ab21a3ad3d270f40e7a92360d7538c059d647d952d1d34

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