Malicious PDF — malware analysis report

Static analysis result for SHA-256 350b934887e9719b…

MALICIOUS

PDF

68.8 KB Created: 2021-09-24 16:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7e4d4de86e7c85e79e76bab37ea44b22 SHA-1: a60df5398f682679c3de9fdec2655f7c994f9e68 SHA-256: 350b934887e9719bc94d3d09891f17adb8c69900464703cf28a2df1eb8782863
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable or link farm domains, suggesting a phishing or redirection scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document's structure as a link farm on disposable hosting, reinforcing the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 5

  • 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.
  • 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://netpage.info/userfiles/file/25523473282.pdf In PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/70234925967.pdfIn PDF document text
    • http://malerbetrieb-malanders.de/Webseite/pics/fotos/1/file/86709442767.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/73818845962.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/35889393270.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/1701597903.pdfIn PDF document text
    • https://lux-ride.com/home/u4-6pzgszajsb5u/www/lux-ride.com/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/xixafufa.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/88356455070.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/75478374238.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/29473812589.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/lutekobovedekavimivodapog.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.excore.hu/ckfinder/userfiles/files/97642940991.pdfIn PDF document text
    • https://ngonluathan.vn/images/ckeditor/files/82630020599.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/60582922726.pdfIn PDF document text
    • https://winstar-tools.com/UserFiles/editor/file/zogimozajo.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/53837616046.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/weromexo.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/1626093605.pdfIn PDF document text
    • http://hagelkonzept.com/userfiles/file/47079481721.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/xofesosizulefuxemetadu.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/9be974b3182bb7142b61c9167bd79364/66299763022.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/75771113850.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/raluxasukukizu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=famoid+trial+100+followersPDF 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_off0000ad7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7F 10648 bytes
SHA-256: 9126b13569d98de126d97c0b71d2a309737e35fbeed32ccd6397bafb4e5b6480
font_01_sfnt_off0000c5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F9 14912 bytes
SHA-256: 376894177fbd3e8c94ec1aeb597e8f1bd9a0ec49ab69e3e949644fc9fb59e0d9
font_02_sfnt_off0000ebf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1