Malicious PDF — malware analysis report

Static analysis result for SHA-256 9603d9a4af7c895b…

MALICIOUS

PDF

77.4 KB Created: 2021-03-09 14:08:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a761f7834fd74929189edc0f1ed6fb84 SHA-1: 37149dc8a79f20089e92a0c65e71769dbb21604c SHA-256: 9603d9a4af7c895bd491fe9c18be2cabe0921d280b44079b4bca39c17576eb19
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a disposable hosting service and another to a domain associated with phishing. The document body, though truncated, contains references to 'Bengali books online pdf' and 'wkhtmltopdf', suggesting a lure to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/123?utm_term=bengali+books+online+pdf PDF link annotation
    • http://idealicaitalia-ufficiale.site/123663581736g3j9.pdfIn PDF document text
    • http://detonic-romania.website/race_max_hack_apk_downloada8thg.pdfIn PDF document text
    • http://mivakoxukike.22web.org/agent_vinod_full_movie_mp4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b3de2af-81e8-4611-a9a6-161018b6892a/sintetiza_la_historia_de_los_derechos_humanos_en_mxico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1f7aef-dbea-4c20-8076-f87ce5604d58/the_chronicles_of_narnia_prince_caspian_full_movie_in_hindi_dubbed_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3103c547-8413-4358-a0fa-768efc8b9ac4/bipepusonalujakirakuki.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/xoforokugalelinufafowo.pdfIn PDF document text
    • http://repuvamiperubo.epizy.com/tintern_abbey_poem_line_by_line_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b053eb8b-9862-40cf-97a0-9ee8b4e8ff66/tepebuwejarotexanavajor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea38e3a-cd18-4515-8555-55c94c668c8c/how_to_connect_my_hp_2542_printer_to_wifi.pdfIn PDF document text
    • http://gawuvuv.epizy.com/adina_forgive_video.pdfIn PDF document text
    • http://vijekidifo.epizy.com/mejafirunagodixiravuk.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/zuzabexuxitorulopufu.pdfIn PDF document text
    • http://zefinut.rf.gd/nilurebiwasibasoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8cb7487-5574-45ab-84ef-61a54c86507c/juwejoxenubakuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93cb7205-fe59-4205-844f-d3f7a86f0f91/how_to_crack_minecraft_windows_10_edition_free_trial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/952e9523-e1c4-4e15-9362-0b43deac8f86/yamaha_rx-v663_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d21577-6352-452b-8ff3-6f6ff437b09b/wordly_wise_3000_book_6_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ddb53b1-c2d5-4bba-b2c5-a2b24525b733/gijepafureru.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_off0000f184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF184 5364 bytes
SHA-256: b1527a2eda1463f919c9488f49c65b49291db9fc1c57d07c83ad9d6f9b4ef85b
font_01_sfnt_off000103dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DC 10844 bytes
SHA-256: ac16fb47d82c6193da61c0ffc3a75db292f4bde1dac4d3fd76bad9726414f203

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