Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c48879d7672659a…

MALICIOUS

PDF

108.9 KB Created: 2021-06-06 17:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f129f8bc5d0f2368cca78a44414e2bb9 SHA-1: 473477eae9587d610c9a8a591f0640b0a221b728 SHA-256: 8c48879d7672659a2af725f799ba2a8467f047e88d58a59a6ae5a5fe2e24ba7d
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely intended to phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://philabc.ru/pbw?utm_term=salatul+istikhara+dua+in+bangla PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488810/normal_6060c6c3c1920.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476925/normal_60bca46da980a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379742/normal_5fcd97941d2df.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/d21336e0-2810-4309-8ea9-a26d0d6fac2d/47879715123.pdfIn PDF document text
    • http://tozuxexap.pbworks.com/f/34110892822.pdfIn PDF document text
    • http://faxofapuf.pbworks.com/f/taromorajedawir.pdfIn PDF document text
    • http://wuwolufit.pbworks.com/f/calvin_and_hobbes_comic_strips_online.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/proshow_producer_10_crack__registration_key_2019_download.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/77876977449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09899b20-d4df-492d-a7b0-e987ddb601aa/92965478108.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/f/what_is_artificial_intelligence_in_simple_terms.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/f/price_volume_mix_analysis_example.pdfIn PDF document text
    • http://banusiv.pbworks.com/f/what_does_it_mean_when_your_tv_flashes_red.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c958913b-00f6-4725-a8d7-93909f622806/how_to_build_septic_drain_field.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d69b19db-7362-4284-9bc4-ff2c3cb9fc59/merrill_2002_first_principles_of_instruction.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/f/the_top_five_regrets_of_the_dying.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f994b7f2-e19b-4599-ad0b-2df6f1b496fc/regepawezotisazakamogemup.pdfIn PDF document text
    • http://jotoxipigi.pbworks.com/f/gua_aplicados_3_contestada_bloque_2.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/f/camstudio_free_download_for_windows_10_64_bit_filehippo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6af89d08-dcdb-44eb-af91-8ad3965fc0f4/25913132932.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000167c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x167C2 25208 bytes
SHA-256: 3f81f9d467c46fe9187aca0a419d7386818596c2ffffa2475b6806c26484eaa6
font_00_sfnt_off0000fae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE1 5048 bytes
SHA-256: 4115291e8819f2fefcb37f68ab31909dc257e7b39f7307668e4852080f814013
font_01_sfnt_off00010bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDC 19380 bytes
SHA-256: d75138dcb69ab8225bc923835d6c577fe82f0a3b7fe5f62bb2864d7ad5b243c1
font_02_sfnt_off00014330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14330 10688 bytes
SHA-256: 0123c78f1959a2989ae50ae3dc312aaaa10e5632c411dea34bace89896c3f6dc
font_04_sfnt_off0001940f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1940F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34