Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a0f101dbdfda772…

MALICIOUS

PDF

75.4 KB Created: 2021-03-01 07:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ee52c19a3dc21a1d431201f4111ca7cc SHA-1: b103df49fa9e3b57e48fa9a02e1af7703852ac66 SHA-256: 4a0f101dbdfda77240beae1c33e5bfad23c7426d60e9bc58c4788b6d6de3fa72
186 Risk Score

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://pelibifir.ru/wix?keyword=best+torrents+2020 PDF link annotation
    • http://xedeporib.medianewsonline.com/68434699069.pdfIn PDF document text
    • https://cdn.sqhk.co/jejekije/bicGjef/dubai_drift_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/guzoladip/DyicidL/zatofavazivubanalos.pdfIn PDF document text
    • http://mafewagidimu.22web.org/raksha_bandhan_film_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/xadopazo/oEXeyib/dialogue_synonyms_for_said.pdfIn PDF document text
    • https://rebavunegiluzu.weebly.com/uploads/1/3/4/4/134497465/e79d26b.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/jjS0Njg/mokefanofenejafa.pdfIn PDF document text
    • https://cdn.sqhk.co/rapurakoke/2wcdlA0/nasozabidu.pdfIn PDF document text
    • https://kapavumir.weebly.com/uploads/1/3/5/3/135313873/mozipot.pdfIn PDF document text
    • https://zuvexege.weebly.com/uploads/1/3/0/8/130814851/0bc25b9e7f55a74.pdfIn PDF document text
    • https://cdn.sqhk.co/tazakabebilo/q20hdic/mountain_car_drive_hack_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/Qeaicjc/tafisas.pdfIn PDF document text
    • https://cdn.sqhk.co/wanifeloxege/wOji5RO/smart_puzzle_hack_download.pdfIn PDF document text
    • https://boziwukajolefix.weebly.com/uploads/1/3/2/7/132711983/3076ffc6.pdfIn PDF document text
    • https://cdn.sqhk.co/tadawatimi/jbGhahe/difference_between_mid-_ocean_ridge_and_rift_valley.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buvodadixasiz.epizy.com/bubizevotofinubinawig.pdfIn PDF document text
    • http://gekobilewubu.rf.gd/acorns_app_apk.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/true_colors_test_blue_gold.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_off0000ed36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED36 4760 bytes
SHA-256: 6bd23a0c3628039bbed0ae93d825e8754c8c9dee970a7387d00fa5e3bbeac42a
font_01_sfnt_off0000fd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD79 10332 bytes
SHA-256: d83fc99f06cb2e43b87d236ac84f71f91a5070bc8389e56e002f1389777117ce

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