Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f4bb5b92ee08e9…

MALICIOUS

PDF

89.4 KB Created: 2021-04-12 08:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f6ab9cb6e90088d5997caa95b0ac2a3b SHA-1: e79829ca3d3a4820d1c005a3b8ff71fa143f0bd6 SHA-256: 50f4bb5b92ee08e9c4947ddbe7ea01c8daaaf309542ebdfccbd615fa247a7d6b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, contains text related to a product search, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://jottigo.ru/strik?utm_term=canon+200d+mark+ii+price+in+bangladesh+2021 PDF link annotation
    • https://cdn.sqhk.co/budajawisore/icCmggX/niganuxujonivogal.pdfIn PDF document text
    • http://fupopujewobajus.22web.org/blue_mountain_ski_map.pdfIn PDF document text
    • http://sizegivip.22web.org/99132183941.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/MHKjima/auto_dialer_system.pdfIn PDF document text
    • https://cdn.sqhk.co/finepawug/ifghTgu/furapejalovekovakudof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_8cf6e3f04fdc4f2391415f36439da1b4.pdf?index=trueIn PDF document text
    • https://0a37a3d5-a0bf-4e77-8ff5-6127fd08aefa.filesusr.com/ugd/6046c9_2f6a160df21c43e78a713f780479d187.pdf?index=trueIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_635b9a6f85fa49419641876391ce3760.pdf?index=trueIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_4ddfa1c8bca04971bd5cdac622aea22c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/britax_marathon_clicktight_reviews_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/vuvonovalujax.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/fishing_report_cedar_key_fl.pdfIn PDF document text
    • https://692937ca-140d-46b9-9715-018e108c1018.filesusr.com/ugd/2540a5_9986af3dd8294d999d25ca40a808c1a1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a44c0b-41a3-466d-91f2-0bad4dd1fe2d/1550629277.pdfIn PDF document text
    • https://d6bf9bfb-c092-4b17-ab9f-91da83e6a9d2.filesusr.com/ugd/d7ad14_391044f84f77448fbf07e6d471da754a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a891bce-e19d-4866-ac63-7ad5bc7414da/nopepiwifokar.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/31203597732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ef4819a-6a7d-4c0c-9719-d4832de22f29/15674928026.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/lazevemuxota.pdfIn PDF document text
    • http://fotobonifugore.epizy.com/kazedajizavufilefenapemov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67cddd5a-f5aa-418c-b2e3-aafc2b66eec8/how_to_reset_2005_nissan_altima_service_engine_soon_light.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_dd78c765018949d9bc0782e6b838d62d.pdf?index=trueIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB7 5924 bytes
SHA-256: 280981d71424cef52c8140bb55acb30e3a80b28c1cd3fad051a1f5dc32324b2c
font_01_sfnt_off000122ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AB 3852 bytes
SHA-256: fb9a9d6d956734aafa617145bc4294d680f35380ebfe4cccb0c41768ced05ec5
font_02_sfnt_off00012eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAB 12060 bytes
SHA-256: 1e00aaa5f6a3511f931f43752b00a941c6406f24f248134420339adfae174096