Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd250f30304a4446…

MALICIOUS

PDF

72.7 KB Created: 2021-06-06 02:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cfb40ae674d58b5efe87b350320b28d3 SHA-1: 038373bc37221e6c2dce62cb5b5ca96ea7da14d4 SHA-256: dd250f30304a4446fb47815bf2ecc94864fcbc939627baf4446583ef5c5ebf72
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://queure.ru/pbw?utm_term=in+shirley+jackson%2527s+story+the+lottery+is+held+each+year+and+it+is+led+by PDF link annotation
    • https://pakujefaf.weebly.com/uploads/1/3/0/7/130740244/4514647.pdfIn PDF document text
    • https://runogobikekeg.weebly.com/uploads/1/3/5/3/135350887/zajujonosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467286/normal_6025c919d56d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385876/normal_60494142c34a6.pdfIn PDF document text
    • https://livugazenexaru.weebly.com/uploads/1/3/1/6/131607095/dadumiletuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/782de164-d9bf-401f-a928-d6d0e6598bb7/19730236394.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144579231/taxutulupegodufejemugel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/450eaf3d-c5c1-404e-a0e1-8c624f441b94/xututaderazinuzogoxugafuj.pdfIn PDF document text
    • http://pebokuvog.pbworks.com/f/mercedes_w203_workshop_manual_download.pdfIn PDF document text
    • http://lomexalipele.pbworks.com/f/37977539312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f32fcbe-b29d-4e87-9751-fdef6d61d7c8/carl_rogers_on_becoming_a_person_reference.pdfIn PDF document text
    • http://xodelow.pbworks.com/w/file/fetch/144451500/sbi_sukanya_samriddhi_yojana_in_hindi_form_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c0b83a-bd67-44a1-89e6-a7f3e26bce13/tinegurivukajaxexu.pdfIn PDF document text
    • http://pugaxigodaka.pbworks.com/f/how_to_insert_diaper_genie_refill.pdfIn PDF document text
    • http://jojekepodef.pbworks.com/w/file/fetch/144634536/how_do_i_fix_my_bissell_proheat_pet_carpet_cleaner.pdfIn PDF document text
    • http://jivevisubido.pbworks.com/w/file/fetch/144670974/adobe_illustrator_cs5_keygen_serial_crack_download.pdfIn PDF document text
    • http://sipibujewadu.pbworks.com/w/file/fetch/144484125/licensed_email_and_registration_code_for_4ukey_for_android.pdfIn PDF document text
    • http://moxulolo.pbworks.com/w/file/fetch/144671400/expanding_tactics_for_listening_teachers_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aa65b4a-2801-4dbf-891a-52d8f79ef035/o_paraso_so_os_outros_download_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1390e0f-6d1e-465f-b36a-8f3a8a1ca39a/ruzobolenujopij.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C9 5380 bytes
SHA-256: c79c98ccbcffe5ebe6a7b166f5bd7440c6c45960e0cd84337e402e1c460828c3
font_01_sfnt_off0000f318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF318 10248 bytes
SHA-256: 5482b90f98c0678ec1bb3f6353a134c8cc8f1d7124486203f89bdf336e3d2c6b