Malicious PDF — malware analysis report

Static analysis result for SHA-256 11793e2c91cd745d…

MALICIOUS

PDF

87.2 KB Created: 2021-03-15 16:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 313b6600deebd117123ebc8984ffe850 SHA-1: 609909746cc28338b4e89ac519dcf34be4a2ea9e SHA-256: 11793e2c91cd745da5ddbad5b68fc1611f90fc6f37e9683e8507e3ce79bfe65c
166 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to host or redirect to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of a password-protected archive lure indicate an attempt to trick users into downloading further payloads. The ML classifier and ClamAV detection strongly support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://bologen.ru/wix?keyword=cara+download+dragon+ball+strongest+warrior+apk PDF link annotation
    • http://nikepexi.22web.org/excel_attendance_template.pdfIn PDF document text
    • http://bivaxosufuxibo.mygamesonline.org/barcelona_city_tour_bus_map.pdfIn PDF document text
    • https://cdn.sqhk.co/xogudililavo/P2RgdpR/pound_cake_recipes_with_cream_cheese.pdfIn PDF document text
    • http://luduloze.iblogger.org/what_does_stairway_to_heaven_mean.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414678/normal_603fa32c155be.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/6rjgsji/nes_duck_hunt_gun_not_working.pdfIn PDF document text
    • http://kudretbozaci.com/eleven_rack_editor_will_not_open_mac24281.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471960/normal_5ff10cd653f41.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/jhxifPw/sarumerosojexabojaxumu.pdfIn PDF document text
    • https://cdn.sqhk.co/sexifirume/hhdIbjd/light_bulb_colour_change_app.pdfIn PDF document text
    • http://lejidakoxinetog.mywebcommunity.org/kudamisuveb.pdfIn PDF document text
    • http://powerpoint4you.ru/whats_a_verb_phrase_examplegoq1o.pdfIn PDF document text
    • http://biniwitovo.mywebcommunity.org/close_corporation_act_south_africa.pdfIn PDF document text
    • http://cookwellbakewell.com/minecraft_creeper_pumpkin_templatem47eg.pdfIn PDF document text
    • https://cdn.sqhk.co/wazuzofi/hciagfE/gamedapelase.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/hierH3C/xefolo.pdfIn PDF document text
    • https://cdn.sqhk.co/bodevoposuji/nhgGGjh/wategudafujezipeseni.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/iahejgh/hop_step_jump_anime.pdfIn PDF document text
    • http://startask.ru/moxeranilurudagexazu9zq09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420025/normal_5fd9e6ec10391.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424009/normal_5fd618e2e49b1.pdfIn PDF document text
    • http://segaruzobuguses.scienceontheweb.net/walmart_hours_of_operation_christmas_day_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fupuzujovo.epizy.com/css_reset_stylesheet_2019.pdfIn PDF document text
    • http://voruluju.epizy.com/alter_ego_plus_a2_cahier.pdfIn PDF document text
    • http://jupevesu.atwebpages.com/duxikimabozuwuluwomop.pdfIn PDF document text
    • http://zopaxavebalopa.epizy.com/86165269566.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ede9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE9 4444 bytes
SHA-256: 96f378c9b20968065918b72b5bef5526deac592a2cc07b59d933b404c20edc57
font_01_sfnt_off0000fdad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAD 5236 bytes
SHA-256: efb1d57a35639959a380e8a79799badc71dda4e59467c1db3045c9cb864f1a56
font_02_sfnt_off00010f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9A 20564 bytes
SHA-256: 804e63d994bbea73587bf494f962880a90ff2b537afb0ab75bb041ae8c017866
font_03_sfnt_off00013e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E56 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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