Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b912753d6d33134…

MALICIOUS

PDF

100.1 KB Created: 2021-03-15 06:10:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da7541fdb9ae773c63a944e19cb0e83f SHA-1: 986ecd183f74ad423c61c9b2bfc6acf47151f0c3 SHA-256: 8b912753d6d33134bbd68f58756ccb27f89e2fb898a8643945a639bd8a61bc2e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are structured as a link farm, suggesting an attempt to manipulate search engine results or direct users to malicious content. One prominent URL, 'https://xezojetit.ru/wix?keyword=legacy+of+discord+apk+mod', indicates a lure related to a game mod. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://xezojetit.ru/wix?keyword=legacy+of+discord+apk+mod
    • https://cdn.sqhk.co/jizuxadif/ifhh5ic/47928518367.pdf
    • https://cdn.sqhk.co/juzureniwibu/gjQclJP/apparitions_ghosts_of_old_edo.pdf
    • https://cdn.sqhk.co/gupimupiset/LKhdhYW/minecraft_slenderman_mod_1._12._2.pdf
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/zotebomin_govosarav_fogawij.pdf
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/vosiwiwota_savemulofunu_mobifituwusa_wofewixuk.pdf
    • https://cdn-cms.f-static.net/uploads/4414678/normal_603fa36437e08.pdf
    • http://delayikapy.xyz/seturivokukomafakexyhfm.pdf
    • https://cdn.sqhk.co/palugalanivo/ihnjchh/affinity_photo_2019_free.pdf
    • http://4gusevshop.space/dbx_driverack_pa_manuale_italianocpsyr.pdf
    • https://static.s123-cdn-static.com/uploads/4450512/normal_5fe2257b1416d.pdf
    • https://cdn-cms.f-static.net/uploads/4447265/normal_6021629752a39.pdf
    • https://cdn-cms.f-static.net/uploads/4481695/normal_600c1b04262b4.pdf
    • https://cdn.sqhk.co/xupasutejos/fjg4b6e/20537403391.pdf
    • https://cdn-cms.f-static.net/uploads/4506170/normal_602c41c30e311.pdf
    • http://olx-delivery.cc/infinitives_worksheets_for_grade_8fnrkx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c4cfc380-6eb8-4e24-a326-98c567ecc5a3/43028527127.pdf
    • https://s3.amazonaws.com/wazotojemov/biblia_de_jerusalen_en_linea_en_espaol.pdf
    • https://uploads.strikinglycdn.com/files/83b2ec2d-484f-420b-9c2d-d2219e2679b3/how_to_change_tiles_in_scrabble_go.pdf
    • https://s3.amazonaws.com/sinamozagemoger/alta_via_dolomiti_6.pdf
    • https://s3.amazonaws.com/pasawe/gexele.pdf
    • https://uploads.strikinglycdn.com/files/1e488f81-4fdd-4e82-b08a-1d5ae587a915/42184997850.pdf
    • https://uploads.strikinglycdn.com/files/a471a6dc-53d5-4079-9e4a-9cb9b6ad930f/55360071881.pdf
    • https://s3.amazonaws.com/towutoginadivu/gowatuwikageseloximefatuj.pdf
    • https://uploads.strikinglycdn.com/files/2bb38968-c012-4f39-974f-f41bbc9492dd/hp_officejet_7510_printer_driver.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00014ce1.bin
27689dc140101cf11627bb8984f795129f01ebc373025bcf607523cc4252eedf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14CE1 29608 bytes
font_00_sfnt_off00010a7d.bin
b90b109c34db9b2d961be312c0c64f13ba4f5af9c83d6ae4556a72cb7f468167		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7D 2880 bytes
font_01_sfnt_off000114bb.bin
c295c74344df2b048d66423dab3b984ebe77e3c2f85b8dfd771df620de08b422		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114BB 5548 bytes
font_02_sfnt_off000127a3.bin
728472a0e141147bfb1f81216a9f0419b61cc7c0374d5d637b255e458e925fa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127A3 10916 bytes

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