Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9396b0ba955036…

MALICIOUS

PDF

77.8 KB Created: 2021-01-26 22:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: d1c42251b02618e084e958b06584ee75 SHA-1: e94938e3f8c48a30ee1a1e237b61d130332e7445 SHA-256: fa9396b0ba955036ebef68e4db1031d7bc5e9f21c009239752eaa0150d8f636d
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on dynamic DNS services or link farms, indicating a malicious intent to redirect users to potentially harmful sites. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous embedded URLs supports this assessment. No scripts were extracted, but the primary attack vector appears to be the exploitation of user curiosity through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://jottigo.ru/123?utm_term=photoshop+cs5+tutorials+photo+effects+pdf PDF link annotation
    • https://filinisosiwox.weebly.com/uploads/1/3/0/8/130814007/vuroxejozoxuni-lovux-jogazuz-wevepusefifebe.pdfIn PDF document text
    • http://tiktoktop.design/78633440981staa5.pdfIn PDF document text
    • https://negozikazaseju.weebly.com/uploads/1/3/4/5/134587396/9153686.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405414/normal_5feb0dec2836b.pdfIn PDF document text
    • http://1freedom.space/zifezizawazojedol0mcr.pdfIn PDF document text
    • http://mifvideo.space/my_planner_todo_list_reminder_agenda_calendarlik1k.pdfIn PDF document text
    • http://domastmsk.space/4135029892300jlg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495246/normal_5fc5e77be41eb.pdfIn PDF document text
    • http://top-odejda.com/secret_of_mana_2_rom_deutschlbcys.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462696/normal_5fd1835eb91c0.pdfIn PDF document text
    • http://semengergel.ru/48802037456a0c3q.pdfIn PDF document text
    • http://iwhite.space/lucky_block_command_vanilla_minecraftyossr.pdfIn PDF document text
    • http://wirodapupoz.iblogger.org/61121025904.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459025/normal_600215b01a570.pdfIn PDF document text
    • http://nalapagized.22web.org/thuc_metformin_stada_500mg.pdfIn PDF document text
    • https://mufuwavujove.weebly.com/uploads/1/3/4/0/134042856/xosidapa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452626/normal_5fcacb28aba11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424933/normal_5ffe6ce4e71fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365563/normal_5fe076e3a930f.pdfIn PDF document text
    • http://uber-global.com/national_geographic_rock_tumbler_instructionsl48i7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421061/normal_5ff3708d6ad93.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wolodavufaxus.rf.gd/adecco_vietnam_salary_guide_2017.pdfIn PDF document text
    • http://sizuzupapefapo.epizy.com/36907117318.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A1 3012 bytes
SHA-256: 6c307ba60cadde95073699babde7790cc691d89e3e1f94789bbada93b75d2ca3
font_01_sfnt_off0000f066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF066 5368 bytes
SHA-256: 2364b569923a0ad5d74ac9a9118e1c670268c834aec5b5d1fd8f1d876abbae8c
font_02_sfnt_off000102ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AB 11372 bytes
SHA-256: 478bc77fd5257191c2548a0bc578582b2b6e1814ae7652bd6d7a63463d6b1627

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