Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2569bb8cddf38a…

MALICIOUS

PDF

87.4 KB Created: 2021-07-13 05:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 55c83b0997c09e907834ce9ff346ff51 SHA-1: 3e0328d085bb361d41ea94647c5b59e7d1cc5884 SHA-256: 2e2569bb8cddf38a0182f8d4166d28be0d8126519c32746a65743637ad33ffb0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document 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 directories and disposable hosting, suggesting a link farm designed to distribute malicious content or redirect users to phishing sites. The presence of embedded URLs and the nature of the heuristics indicate an attempt to exploit users through deceptive links, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://usmleworkout.com/files/file/loxamolasutuwodoz.pdf In PDF document text
    • http://bukharageorgia.com/sites/default/files/file/nuwotaguderedebujagigirog.pdfIn PDF document text
    • https://shidoremicrosys.com/media/jujamogoze.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/160c04a28f9fe438c3ce0263edafa1ea/zigidupovuwudevu.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/goxarifipate.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/69639886158.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2f9a1d1bc---49152966950.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609602f05a498---10079466071.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/61227096823.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/21167356150.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16077b18ab2f02---55761314510.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/b9dac1140c0cc64216120af43315a825/sudene.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/97995899872.pdfIn PDF document text
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/cab987b2b3ca24b8069a19285e79debd/kinusorijisi.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/6c6656c6660ecbc21e9737025483c205/nokaz.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/balano.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/suforav.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1740c5ed21---susuwetirabupobezan.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/aqh5f0ueg80t1se72ql3l4knd6/77819097467.pdfIn PDF document text
    • http://lohsclassof70.com/clients/3/31/31ca850ff086a58b81c8700e10a01852/File/84586002799.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/4661581688.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210702/000327971.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/45689606643.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993d06d73f1---67019515925.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607899c53a0e5---kijekudopuma.pdfIn PDF document text
    • http://hopkins1983.com/clients/861771/File/natitexag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=small+business+management+16th+edition+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_off0000f2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B2 16472 bytes
SHA-256: 897e3fc2129e449ca4228744c8d5562f1af268418579db4bf36d9762dfa97b35
font_01_sfnt_off00011d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13590 11380 bytes
SHA-256: 4bba32b8dbe3180d15c3aa4df45be165fcb5e6efadb5426c981a5f9cab7960bb

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