Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca20947fe71276f…

MALICIOUS

PDF

171.3 KB Created: 2021-03-20 12:17:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 38f3a8baba5beff60c1926ff67152174 SHA-1: d264c4b95ec5f8933ee280b2259891d1c9230d0b SHA-256: aca20947fe71276f926f5b5f5fce96a106b34fcd9e178f3d86b920cbf63cd8dd
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, with one specifically identified as part of a link farm on disposable hosting. The document body, though heavily obfuscated, suggests a lure related to search terms, likely intended to redirect users to malicious sites for phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9184

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/award?keyword=bhagavad+gita+in+telugu+pdf+format PDF link annotation
    • http://wisopenudaris.22web.org/46905627724.pdfIn PDF document text
    • https://cdn.sqhk.co/fufitefan/iv8hd2d/taliwijatakogonerapogafeg.pdfIn PDF document text
    • https://cdn.sqhk.co/tenalewi/5iighbX/7985899577.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503525/normal_600a464c12740.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/ijazjjm/sd_tank_war.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/3jf90AT/consumer_reports_least_reliable_cars_2018.pdfIn PDF document text
    • http://nugotokilovol.iblogger.org/rosemarys_baby_book_chapter_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/XgAjbgh/bulave_tujhe_yaar_ringtone_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376601/normal_5fdeec0ce3a86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461777/normal_600e955a5177b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471683/normal_601199164f513.pdfIn PDF document text
    • http://wodaserurefuw.iblogger.org/articles_of_confederation_reading_comprehension.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/377597a4-0bd5-4f61-8750-5dfec09218e8/divepusixetomem.pdfIn PDF document text
    • https://a943cdc4-551e-4fd6-8842-bb1c82e441e2.filesusr.com/ugd/a0303e_c2b8e0e99cce41748829cfa0ffe7b2ff.pdf?index=trueIn PDF document text
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_1fedc75fbbc14befbf4f233a1f30679a.pdf?index=trueIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_a783704dd3904962be2b6cebdf598663.pdf?index=trueIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_5b07bb1a80eb4c4da2286a51a820df35.pdf?index=trueIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_55abcd00fa04415bb991a57c3c4985bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/330b27f0-179a-4bb0-af4f-26ff16ae1f5e/what_was_the_renaissance_in_western_europe.pdfIn PDF document text
    • https://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_567c1635e25746cdb75b4989891dc4e0.pdf?index=trueIn PDF document text
    • https://93bb5028-8b17-4c47-8ab9-f46a024b0e86.filesusr.com/ugd/041612_56e50014e0d44083b33a810192f4ac23.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/576e0f9a-2875-43a9-9055-e49dca9a3978/how_much_does_a_large_bale_of_hay_weigh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4932ca4b-a2cf-4bc8-8901-e6b9a44b360c/57098071329.pdfIn PDF document text
    • http://mojelol.epizy.com/modos_de_produccion_feudalismo_y_capitalismo.pdfIn PDF document text
    • http://jinufezep.epizy.com/jasper_report_table_design.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://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A68 4788 bytes
SHA-256: 2b401f740ae3914f7b7de054236ce50132b5fad60caec7749938d4bfa5a3b188
font_01_sfnt_off0001ab30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB30 5388 bytes
SHA-256: 40112fe36ac240347058c9281b94f51583f6578f8d3f5eeea95df26cf794c6a8
font_02_sfnt_off0001bd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD68 21272 bytes
SHA-256: 63078fda97846b3a87eeef6a579f7a368db89baaee8b77f52d4e276c8139cdef
font_03_sfnt_off0001de5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE5D 47960 bytes
SHA-256: 3ad77143a4988e88bdd2ad3d60c6df0448756b11ff496ccb9bf5542b05a65ee3
font_04_sfnt_off000239c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x239C1 17636 bytes
SHA-256: c449bacea2bf422955e3a3506a7cc1561e70cdcf937ae4627f2cb25d0e92b066
font_05_sfnt_off0002710a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2710A 17548 bytes
SHA-256: dbb7b9d02156e269bb00ca2cb674affb2eed3cba2509e5323e96c089f1d9d06f
font_06_sfnt_off00028b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28B8E 6104 bytes
SHA-256: ab0ac9877456e13acf0f4c97097c310ca064a8fd85ef3aba42cd1ca89ac79178

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