Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd2d980f2aa4666…

MALICIOUS

PDF

67.8 KB Created: 2021-09-23 05:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f7501dc4129adf861d8d9edb5fc3924c SHA-1: db2cf29222e13f901ec8aaacff4780b4c9202915 SHA-256: edd2d980f2aa4666afb666eebfd49a578ddeb1c98f55b63d059705e0b475d3de
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to facilitate the download of further malware or unwanted applications. The presence of embedded JavaScript (T1059.007) suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://digitaluzaktanegitim.com/calisma2/files/uploads/30554413904.pdf In PDF document text
    • http://giayviettri.com/img-ftec/files/fanidifupafa.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/mirukemakurutivagusuz.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/43jk8cgckp9o95q54n9jr3317k/36248043395.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/xavexejebevononabonu.pdfIn PDF document text
    • https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/vadomadenijokelaxipima.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/97619270966.pdfIn PDF document text
    • http://sk-massimo.com/js/upload/files/36863736539.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/gidolitawononel.pdfIn PDF document text
    • http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/tugofumela.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/icoavteoq3bld97si7jsetqt8q/41700842200.pdfIn PDF document text
    • http://rujiahk.com/uploadfiles/file/92040845442.pdfIn PDF document text
    • http://lexuspolymers.com/assets/ckfinder/userfiles/files/58579365130.pdfIn PDF document text
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/16586088911.pdfIn PDF document text
    • https://digireg.si/upload/66522750798.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/26869964209.pdfIn PDF document text
    • https://linkevicius.com/upload/galery/file/sonuwoli.pdfIn PDF document text
    • http://word.mn/uploads/assets/gubajufadokuvelirudu.pdfIn PDF document text
    • http://kahsport.cz/userfiles/file/rufuturalevanirago.pdfIn PDF document text
    • http://paletydozahrady.cz/ckfinder/userfiles/files/sakamujerolaxebax.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/2721393688.pdfIn PDF document text
    • https://svltv.in/userfiles/files/bazodavezakexegedukiv.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/pamedigipizosalabuxesasa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=taptap+android+downloadPDF 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_off0000aedb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEDB 10132 bytes
SHA-256: ef3842c4e1c9a85b1c9c2c59a6bbd32e8e3e2362f1a74610f305f683c858dcbd
font_01_sfnt_off0000c591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC591 14616 bytes
SHA-256: 218308709e364b497110494ec68bb3e433f6112bdece88b9ccd0cd54574596c8
font_02_sfnt_off0000e9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1