Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6f15deeeab341d…

MALICIOUS

PDF

75.5 KB Created: 2021-03-22 11:01:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 254e7a8af68771d454bc32b5a4e76108 SHA-1: 66eac3aec8a3621c240b52a51d868b4827f5886a SHA-256: 8b6f15deeeab341d11c552c818528801033f2156cf9b5ca1688782548eba4da9
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=pdf+printing+blank+text In PDF document text
    • http://specrazreshenie.com/how_to_use_toastmaster_mini_blender0pi34.pdfIn PDF document text
    • http://jujiwaneko.iblogger.org/wepaxafogatixabewiz.pdfIn PDF document text
    • https://cdn.sqhk.co/nanagajog/fsNXJ5V/ditudoxaxajibalam.pdfIn PDF document text
    • http://tiktokfrance.fun/resumen_del_libro_historia_de_la_iglesia_cristiana_jesse_lyman_hurlbutui7mz.pdfIn PDF document text
    • http://7evenrp.ru/lusajulazomokegagetojz1n8o.pdfIn PDF document text
    • http://puveduxorapuba.iblogger.org/affidavit_of_service_by_mail_template.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebapenuj/ghbgjDC/fatudewu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tenovelipa.rf.gd/abraham_maslow_s_hierarchy_of_needs_theory.pdfIn PDF document text
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_641a54c29d1148cfaf3f3e8206aa2ac5.pdf?index=trueIn PDF document text
    • http://mowelafawugek.epizy.com/el_arte_de_amar_film_polaco.pdfIn PDF document text
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_34141a1a7706442cb384c61d8b0a22ac.pdf?index=trueIn PDF document text
    • http://gafibis.epizy.com/neronidejobilok.pdfIn PDF document text
    • http://rolonitefokive.rf.gd/xebetaluzasufafigimawawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7821bee-dcbb-45a7-9a5f-0e931fb8ac97/19193359726.pdfIn PDF document text
    • http://vogilidiniluti.rf.gd/perdona_si_te_llamo_amor_pelicula_italiana_completa_en_espaol_latino.pdfIn PDF document text
    • http://xajejosiwoja.epizy.com/agricultural_science_grade_12_caps_textbook.pdfIn PDF document text
    • https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_0ebb1f3d2a684baab792d8ed1c0c8cb3.pdf?index=trueIn PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_83bf5d87ffd540e7a39aa791664770da.pdf?index=trueIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_e9e49c8375ac439883a8c9b970ddf4e6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee13f26d-3297-45f8-b1ae-3c4fcd89ee26/why_are_my_computer_speakers_humming.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE735 5304 bytes
SHA-256: 9b8d70d83cab6a3131f2ce8603b93d8a0e7a82c58f89450752610168e093f501
font_01_sfnt_off0000f953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF953 11860 bytes
SHA-256: c0fc389738a3a88ec7e94553fc6ac18e6100419cff3c9375047e60a488dacbb8

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