Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe054529af871ff…

MALICIOUS

PDF

72.0 KB Created: 2021-03-24 16:00:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6040832b52fc8e40fbaa94e56d9ee01a SHA-1: 4cb41aee4e2074e622bb095acf2a45fc6ba698fe SHA-256: afe054529af871ffb602c2646219e68009c2be142af43a35f89cd281138f5780
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary one pointing to 'xezojetit.ru', which is flagged as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=logo+quiz+answers+level+8+iphone PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393020/normal_5fecbd1da00e9.pdfIn PDF document text
    • https://cdn.sqhk.co/dirodivive/jiilwig/jw_library_app_download_for_windows_8._1.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/gSukTgj/zuloxebinegarapakarube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409118/normal_603fa61443add.pdfIn PDF document text
    • http://circus.market/m_audio_fasttrack_pro_manualtv3bl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393364/normal_5fe128df51e1e.pdfIn PDF document text
    • http://vashobereg.com/nadoge0lizq.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/aSejfji/bafikidirudusodoku.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/71290228907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378848/normal_604129647b9aa.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/59409132512feigh.pdfIn PDF document text
    • https://cdn.sqhk.co/karapenakozi/E0ihgdl/rare_beauty_eyeliner_selena_gomez.pdfIn PDF document text
    • https://cdn.sqhk.co/dawupana/fwATrgd/train_simulator_free_games.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/63956138471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481161/normal_604f005ce82b3.pdfIn PDF document text
    • http://fortuneocredit.com/bixufeguwoxusuqeku.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/Wic44ge/football_cleats_adidas.pdfIn PDF document text
    • http://instapriz24.online/minecraft_pocket_edition_free_download_for_pc_windows_10_full_version2qczp.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
    • https://uploads.strikinglycdn.com/files/fb36cfdd-85bc-4dc6-b8bb-9f6571027d3f/how_to_maintain_a_nuclear_power_plant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bbdd83e-b128-4f4d-863f-59e86a623545/puforenuxojirelef.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/adaptation_in_animals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b578fac2-8dec-4de9-a53c-91503b16c367/lefisozuxam.pdfIn PDF document text
    • http://ranitirunom.myartsonline.com/citalopram_hydrobromide_davis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/211124a4-0058-4ab6-8589-db4a8ae529ac/cisco_8742_manual.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_off0000d160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD160 5348 bytes
SHA-256: e4915192c6dbdb4cf9efb056027991ea5f1894f2c8a8ea9cf5a826725c09b67f
font_01_sfnt_off0000e39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39C 9408 bytes
SHA-256: 99c78830bb17cce79c81f9420e464975e5d1076cfa43aa698c45f53e87cdddcf
font_02_sfnt_off000103e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E2 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c