Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca114e3890c61f56…

MALICIOUS

PDF

91.6 KB Created: 2021-04-02 09:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3e65f0f73256c040d689f9f9634c1277 SHA-1: 9e0798f7c6f79b48e3e17e4c669e764bc841a462 SHA-256: ca114e3890c61f561a200e4a804cbbc757c3a0ce1e04ad2439b55972e2db7ce0
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 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.
  • 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://dugedepap.ru/123?utm_term=messenger+mod+apk+onhax PDF link annotation
    • https://posijakafit.weebly.com/uploads/1/3/5/3/135320461/9663721.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/80349138637.pdfIn PDF document text
    • https://nalovitifa.weebly.com/uploads/1/3/4/6/134600698/jaboliketiza-kevan-vugirojamaz-mebole.pdfIn PDF document text
    • http://jupitivom.22web.org/9501380370.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuponefi/92602485835.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/free_bluestack_uptodown.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/adjectives_worksheets_for_class_4.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/donatubufibutij.pdfIn PDF document text
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_86aa7ffeb00849cab96a6d78f286f0ff.pdf?index=trueIn PDF document text
    • http://bawemolar.epizy.com/how_to_prepare_for_kangaroo_math_test.pdfIn PDF document text
    • http://wovibojo.onlinewebshop.net/asterix_and_the_vikings.pdfIn PDF document text
    • https://b3dfd9c9-1030-471f-a26d-814ea73dbccc.filesusr.com/ugd/d97afa_d9f9915b8aab4e76b803b334be0b2d3e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/what_orange_juice_do_you_use_for_mimosas.pdfIn PDF document text
    • http://fojakosi.atwebpages.com/bach_cello_suite_1_violin_imslp.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/can_you_use_macros_in_google_sheets.pdfIn PDF document text
    • http://xovijoj.epizy.com/amiga_os_3._1_4.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/64911126652.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/42346818284.pdfIn PDF document text
    • http://nupuzawov.onlinewebshop.net/catastrophe_bonds_reinsurance_and_the_optimal_collateralization_of_risk_transfer.pdfIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_2e35f167985c48919d11bdda33fe32d7.pdf?index=trueIn PDF document text
    • http://forilojemani.epizy.com/best_riddles_and_answers_brainden.pdfIn PDF document text
    • http://retelowanudugut.epizy.com/baby_rudin_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/bennie_and_the_jets_piano_sheets.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
    • 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
    • http://scripts.sil.org/OFLIn 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_off0000f5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E7 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off000106cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CC 5480 bytes
SHA-256: 4a44c03a3b764c4f52abc850f3c481e762ab54101f6a5e37bd641aa480eaf65c
font_02_sfnt_off0001194a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194A 1936 bytes
SHA-256: cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d
font_03_sfnt_off00012289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12289 11796 bytes
SHA-256: 16ed5fe5ff2809566d4ae7c06b90e64baf54023c6ee1d03ea31564241cab71c6
font_04_sfnt_off00014b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B11 16160 bytes
SHA-256: 9ffc405fbed68b1ed35cf25504b2a045b5802e2074cf99e6920a228075e829fc