Malicious PDF — malware analysis report

Static analysis result for SHA-256 98bb345beb7ab6ca…

MALICIOUS

PDF

77.0 KB Created: 2021-03-10 07:33:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40726a547c4e7b0897a37e24fff924d1 SHA-1: 27dfe8837f4c191720c072607ff1ac67d732a68b SHA-256: 98bb345beb7ab6ca277bb932b79feb9d3b649e19d7662d92f892c41883cec9af
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a "PDF_SEO_LINK_FARM" heuristic, suggesting a malicious intent to redirect users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous external URLs and the nature of the heuristics point towards an attack pattern involving redirection and potential exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/award?keyword=cd+action+pdf+wykop
    • https://lamuwibosuzo.weebly.com/uploads/1/3/1/0/131071033/vapej_posuz_vosobiguf_dezor.pdf
    • http://tekeriset.iblogger.org/apache_poi_jar_file_for_eclipse.pdf
    • https://bipuwuvi.weebly.com/uploads/1/3/0/7/130776795/441f6dae6f6f56b.pdf
    • https://cdn.sqhk.co/jetekujob/jOjduur/accelerator_plus_crackeado.pdf
    • http://nomevufaneboja.mypressonline.com/learning_and_development_methods.pdf
    • http://xunawuloraxoru.22web.org/kubipub.pdf
    • https://cdn.sqhk.co/fadejiweruw/hbiZYjg/56147464029.pdf
    • https://cdn.sqhk.co/zofagopipowi/mibhiUV/haunted_house_escape_2_scary_horror_games.pdf
    • https://gizetaxawu.weebly.com/uploads/1/3/1/8/131871526/8290619.pdf
    • https://cdn.sqhk.co/kupuruvew/tjcOAgh/can_t_install_software_update_on_mac.pdf
    • http://bidetoluji.getenjoyment.net/graphic_novel_download.pdf
    • https://wesedujixezibo.weebly.com/uploads/1/3/1/6/131606467/lafodenoni_zuloti_waroxogujotu.pdf
    • https://cdn.sqhk.co/wetaxawirewu/wkhdpBe/39994369362.pdf
    • https://xejoxobufedad.weebly.com/uploads/1/3/3/9/133997298/896f4af123d.pdf
    • http://funuretebinuzos.iblogger.org/dodixubugur.pdf
    • http://ketorebagibof.22web.org/waxukedibexijil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://texagofudadeket.epizy.com/81351086203.pdf
    • http://worubag.epizy.com/weziditaxowuwalut.pdf
    • http://mopasaz.epizy.com/free_banner_design_templates_psd.pdf
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_b7fcdabc23704eb298fe9dcb536d29d8.pdf?index=true
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_8ae0a706ba664f39a82e8244449dc7a3.pdf?index=true
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_a5ae95884d4c4920833505ffd1361847.pdf?index=true
    • http://lisuronam.rf.gd/how_to_make_phthalo_blue_oil_paint.pdf
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_7b614daa4a5e4b2bb685c97cb67a176d.pdf?index=true
    • http://lijowavatajo.myartsonline.com/gudebegewogokopunibobo.pdf
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_3c241027cb814221ba58a62b43b98735.pdf?index=true
    • http://xetixeguxiji.epizy.com/auditoria_de_sistemas_de_informao_imoniana.pdf
    • http://towuvoti.epizy.com/best_bedside_mode_android_app.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f257.bin
3f5df0f7655c3bdebd3ad164ccb40e021de52af1b75acf86979565addf0ff424		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF257 5004 bytes
font_01_sfnt_off00010392.bin
5d928d37c10ce191c7d7dac113acc057a5d68255dc729759c49f6adfaa9e69d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10392 10124 bytes

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