Malicious PDF — malware analysis report

Static analysis result for SHA-256 654738c2f51e9d30…

MALICIOUS

PDF

86.3 KB Created: 2021-03-05 10:41:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 841fd17f3d43b53ab225e105d4963c95 SHA-1: 48ec7407337d041d37982b38b9b4564a095d565a SHA-256: 654738c2f51e9d308c6619e4c244409902ed9f97c3044d18760073ca51ba99be
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic point to a malicious web redirection or content delivery strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://botokaw.ru/123?utm_term=how+much+is+disney+after+hours+cost PDF link annotation
    • https://cdn.sqhk.co/zubavagi/YW5hZij/dorajibixujeseroraxomari.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495551/normal_5ff8be23be91c.pdfIn PDF document text
    • https://cdn.sqhk.co/nofevemumidu/gibrhhj/zombie_horror_game_download_for_pc.pdfIn PDF document text
    • http://banademebilite.sportsontheweb.net/what_age_is_charlie_and_the_chocolate_factory_book_for.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403674/normal_6023ca677dd88.pdfIn PDF document text
    • http://jezolixepoj.22web.org/gift_wrapping_sheets_online_pakistan.pdfIn PDF document text
    • https://cdn.sqhk.co/zarudaletok/ehfCjjc/faith_family_medical_clinic_arlington_tn.pdfIn PDF document text
    • https://cdn.sqhk.co/bepesewutu/Eiegerp/call_of_cthulhu_dice_roller.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403276/normal_5fcda5876e784.pdfIn PDF document text
    • http://vanibunogi.iblogger.org/lazarillo_de_tormes_resumen_del_prologo.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/ihgchaw/wewokibo.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/diono_2020_radian_3qxt_4_in_1_convertible.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://rixuroruwe.myartsonline.com/97768794761.pdfIn PDF document text
    • http://dufenujel.rf.gd/common_core_math_worksheets_4th_grade_multiplication.pdfIn PDF document text
    • http://benugerevum.rf.gd/bixug.pdfIn PDF document text
    • http://tazuwaxerufuje.epizy.com/cultivo_comunitario_de_arroz_na_china.pdfIn PDF document text
    • http://denonewozififuz.rf.gd/how_to_use_kitchenaid_stand_mixer.pdfIn PDF document text
    • http://bevowamudad.epizy.com/guided_day_tours_in_iceland.pdfIn PDF document text
    • http://xawegusuwavol.epizy.com/16204838249.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/can_you_look_up_a_fedex_by_delivery_address.pdfIn PDF document text
    • http://gifidabula.atwebpages.com/yunus_cengel_heat_transfer_download.pdfIn PDF document text
    • http://nexofemexer.epizy.com/56631192358.pdfIn PDF document text
    • http://kojexeruxub.epizy.com/77460070545.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_off000105b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B0 5264 bytes
SHA-256: c7c68e0998751e68bff9e1ed8815823041f6bf8d96fd96ce21763aa4a0b3ecdc
font_01_sfnt_off0001177d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177D 11100 bytes
SHA-256: 81bd841ae25d0989c84b25c1b02597d4061fffe0aa805cdb1520f312784c0a1a
font_02_sfnt_off00013d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D3C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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