Malicious PDF — malware analysis report

Static analysis result for SHA-256 36101be9c4761093…

MALICIOUS

PDF

151.4 KB Created: 2021-06-15 15:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 401a27947bde39cb4693978edb5d3ecd SHA-1: 53f5fbc86e5f92e4d79dfe92cc65b9afdfb54a9e SHA-256: 36101be9c476109329508eae3df107f9c72d8b6ec68125d63156f61512ce13ed
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which host further PDF files, suggesting a link farm or redirection mechanism. The presence of a 'download button' lure and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9709

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://archism.ru/uplcv?utm_term=mega+hit+poker+mod+apk PDF link annotation
    • http://amuseonline.com/absite/userfiles/file/74622028864.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb7d1e4991---safitubadup.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fca40eb17---mutebekufonis.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160880331e3674---negidunasolunaronej.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/31c12893d50b514187ffb890d3a8edd7/42826680331.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/18901705121.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609886974029b---marikimivezabilobuf.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608751e07b579---11299420172.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/22124129447.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/jb1jtrbs8o2i65hbqeu8a35rei/59462060458.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/adv58ccib3a593sd10tlkcr7h7/runagezagifidivuze.pdfIn PDF document text
    • https://immobilgold.com/file/22274979551.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160886e9e485e8---15218662950.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c0vk1oq51cjo5gikp44gih9rg1/97782765176.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/donaxagoruguboroxo.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/62c700b11a441f22c3f0fd7f9c87f8ef/48185572874.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000173f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173F3 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off000184aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184AA 40316 bytes
SHA-256: 7d76d451aa4b486c63d0fa42669997b41bb5b1f2603da3a4852f8adb795d822d
font_02_sfnt_off0001f132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F132 5232 bytes
SHA-256: 8777e2d47f206886bcc198456d27a7a9842cd3fe5ed3c9048ce268bea8336ecb
font_03_sfnt_off000202db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x202DB 2092 bytes
SHA-256: 13678a14b930e6d42e11b2ac41b13981c2c7f5938cc30cfb194ad51886f1f1dd
font_04_sfnt_off00020c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20C80 12996 bytes
SHA-256: 8cf1a7e44d198845eaa4c86fd1cbe7f635bc6495db0c5c50db57f4dd324a103e
font_05_sfnt_off000237ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x237EE 16464 bytes
SHA-256: a034495b7b1d8e147c441854ba6d90b36bdf9c111720eba50e0741829bd85990

Open this report in the interactive analyzer, or submit your own file for analysis.