Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c13e040276a0432…

MALICIOUS

PDF

91.7 KB Created: 2021-06-11 06:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c226e1e315558b3e43412f68a2be9093 SHA-1: d0acfe85b6d4f834fb8bd71a7ffffd954cbd6c77 SHA-256: 7c13e040276a0432ba9bd38a793348a80c2efd6d20943d6604d7cb24c455e648
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL leading to a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination of the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pixomot.ru/pbw?utm_term=o+mehndi+pyar+wali+hathon+mein+lagao+gi PDF link annotation
    • https://gurogujanesoxub.weebly.com/uploads/1/3/4/5/134506981/2333311.pdfIn PDF document text
    • https://juxupadozimufa.weebly.com/uploads/1/3/4/3/134388451/c69e8c369.pdfIn PDF document text
    • https://jetosiwer.weebly.com/uploads/1/3/4/7/134767378/b2baf084.pdfIn PDF document text
    • https://lilafigofuku.weebly.com/uploads/1/3/1/3/131398347/nonojubebafipi.pdfIn PDF document text
    • https://ruxoworajesuz.weebly.com/uploads/1/3/4/3/134387888/3103415.pdfIn PDF document text
    • https://jowavuzawevubab.weebly.com/uploads/1/3/2/3/132303017/pimivid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://debitagemi.pbworks.com/f/94383337826.pdfIn PDF document text
    • http://gulisapil.pbworks.com/f/how_to_write_a_parole_support_letter_texas.pdfIn PDF document text
    • http://ruzezotep.pbworks.com/f/libro_electronica_de_potencia_rashid_3_edicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2845f69-4e24-4655-9b23-ae17122657c9/76310417988.pdfIn PDF document text
    • http://gabumur.pbworks.com/f/xbox_360_emulator_download_for_android.pdfIn PDF document text
    • http://nosegawibaso.pbworks.com/f/ejercicios_comparativos_y_superlativos_en_ingles_para_nios.pdfIn PDF document text
    • http://vatojorisa.pbworks.com/f/does_cheaper_than_dirt_have_a_retail_store.pdfIn PDF document text
    • http://tufukamapaf.pbworks.com/w/file/fetch/144568152/watoz.pdfIn PDF document text
    • http://lisidasaxow.pbworks.com/f/logo_quiz_all_levels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc2f00a-cde5-45e8-8491-1d6e68bbdb7e/93931037552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7932fad5-4774-4c9a-b889-662ba7317d10/oracion_de_la_biblia_catolica_salmo_91.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/283c8307-82a1-4eac-b1ec-cbbb05c01546/daxexedipipigozomopukin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac2bf20-b547-4a98-8f5f-387db3c5cd38/50628657731.pdfIn PDF document text
    • http://dumogaluz.pbworks.com/f/pubepejinipobeluw.pdfIn 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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F1 5416 bytes
SHA-256: 0b91e657fb1f00d6c4a82339e6bca9d0506bb76b3b2befe9d8390d9895fc4e1f
font_01_sfnt_off0000f840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF840 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off000103a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A3 11240 bytes
SHA-256: 0e0fb572f670f5b464bf57422b3c1a9ea817eb62845ff709873dcfbc277bcac2
font_03_sfnt_off000129e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E3 16264 bytes
SHA-256: 133b4d370483c8bf43c5d93d89645e56191035830606af38716b70fdccc65eff
font_04_sfnt_off00013f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F84 10544 bytes
SHA-256: 77c67c339cdbfbfae27cec7e2a7b9b4f1a9610f369e71e55bcd7d355c4dcd2f7

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