Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f711adc7dc448a…

MALICIOUS

PDF

84.2 KB Created: 2021-03-18 18:35:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: aa91c777b5118b75e599c3a7798fae18 SHA-1: 56fd9fc63b9c971a0a854aab56d8ac7cb3ec0fc2 SHA-256: 11f711adc7dc448a273deb383b986cd308e53d28c36b6077b0458d75cd8ab627
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous external links, many pointing to disposable domains, and includes a heuristic for a link farm. The presence of a 'download button' lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content, likely related to cracked software as suggested by the URL keywords.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=vce+to+pdf+converter+crack PDF link annotation
    • http://ru-1.casa/what_is_the_deeper_meaning_of_romeo_and_juliet5sh12.pdfIn PDF document text
    • http://dazemuwemez.22web.org/bowflex_max_trainer_m8_vs_proform_hiit.pdfIn PDF document text
    • http://price-list.moscow/rocketbook_apple_notesbskrb.pdfIn PDF document text
    • http://sevastopol.sale/lawefuti9igjw.pdfIn PDF document text
    • http://harmony-market.ru/manualidades_para_halloween_educacion_infantil15eol.pdfIn PDF document text
    • https://xowemaxixedire.weebly.com/uploads/1/3/5/3/135325030/1b61cc0.pdfIn PDF document text
    • https://pemolopudamas.weebly.com/uploads/1/3/4/7/134753943/rofop_xonural_xiwela_kariso.pdfIn PDF document text
    • http://byseles.xyz/nemeperegizorebaxason9b1t.pdfIn PDF document text
    • http://wei-nmvc.com/island_village_game_mobile2vxzr.pdfIn PDF document text
    • http://prequester.online/lotos_plasma_cutter_troubleshootingdg78j.pdfIn PDF document text
    • http://copyrightshelpscenters.com/how_to_repair_ultrasonic_humidifiercgfvs.pdfIn PDF document text
    • http://pro-gram.pro/3614379819a6eta.pdfIn PDF document text
    • http://vykupavto54.ru/432598740557rwn.pdfIn PDF document text
    • http://insuranceautousa.com/52263475852tbr.pdfIn PDF document text
    • http://shoes-storie.club/dabibiworeluwas4k5x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://litopojijerel.epizy.com/inclusive_design_guidelines_for_hci.pdfIn PDF document text
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_07e913ced86b4528aa44774572985ea6.pdf?index=trueIn PDF document text
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_8ba9d6980d9c405982212e3496d652c7.pdf?index=trueIn PDF document text
    • http://sobakijej.rf.gd/wetlands_wow_quest_guide.pdfIn PDF document text
    • http://nowonetaxada.rf.gd/kefege.pdfIn PDF document text
    • http://lararuzimefusi.rf.gd/73655804035.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA98 5028 bytes
SHA-256: bb890ac0721f46cfea78bff6fd78b124d1c6ee99fc0f70f4f0ed73cc5c3851b6
font_01_sfnt_off0000fbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD5 20492 bytes
SHA-256: 6938ffdc60ca7c010e116a03bf16478847f812e929ed10272e77a3fea324942d
font_02_sfnt_off00012c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C2B 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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