Malicious PDF — malware analysis report

Static analysis result for SHA-256 368ea00de6d424e1…

MALICIOUS

PDF

101.3 KB Created: 2021-09-22 15:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 32c206beca9570ee769cf5b2052276db SHA-1: 7c640f6b658987a9d2d5defd1bda52d23ada99e0 SHA-256: 368ea00de6d424e1c86efe2a638ac94c4b2b6cacf449d0532112afb68ad35b25
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://urbanlivin.lu/userfiles/files/51075573117.pdf In PDF document text
    • https://scout-educationguide.com/userfiles/file/sajanifinap.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16137a3017f363---55709264555.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/vufezodususurixupatoxib.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/volemowu.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/gitazufowulurijebabalo.pdfIn PDF document text
    • http://wine-paraphernalia.com/files/winep/_repo/file/55016798829.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28340861307.pdfIn PDF document text
    • http://gemaeldeundobjekte.de/uploads/files/56243124933.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161460f2285d4a---80864640742.pdfIn PDF document text
    • http://internet-trade.cz/UserFiles/file/91106008668.pdfIn PDF document text
    • https://www.lipca.com/ckfinder/userfiles/files/zagakinibivofulifanile.pdfIn PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/temuzozozuxisawela.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/kapidu.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/nigumipoxurevomikesofi.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/gupiranaj.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/9ad855a52a96bc1e92c37e20015f31d2/gimejevikaje.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/xuwerijobomifovavojeb.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/suluzirumimomax.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/90456025553.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/7bab85d62df74a13e7f5607a46aa33e7/25881943218.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/zasimolopuwin.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/gijumodojefekuwodosadixo.pdfIn PDF document text
    • http://inkjetartandimage.com/Uploads/file/51316741719.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/disomisexujaxifatiput.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+50th+law+summary+pdfPDF 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_off000124cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CC 18984 bytes
SHA-256: e7997b1a2342d901764d7bba5665843f60510b8ec44f9d3d3d9900297be98101
font_01_sfnt_off000155ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155FF 10964 bytes
SHA-256: 0008d925efeced8c5a1e47c62fb89d36ce654f81f7f40128358d39329a318cdb
font_02_sfnt_off00016f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1