Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9cd91c2106d962…

MALICIOUS

PDF

76.9 KB Created: 2021-03-16 10:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 39c42dfe98825eef9f83cfaa143c1e3c SHA-1: ffd9ac706392a2b4aff2b163aacd370a26f2bd1f SHA-256: 3d9cd91c2106d9624ca4eb90b62fe312be7b3b95adae81ac1f74f4dc3a2a8b80
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to disposable hosting or redirector services, indicating a link farm or phishing lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. While no scripts were extracted, the structure and URL patterns strongly suggest a malicious intent to redirect users to harmful sites, likely for phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=william+vincent+brown+wife In PDF document text
    • http://xarapover.mygamesonline.org/26081856835.pdfIn PDF document text
    • http://gladkoe-telo.xyz/dajukazitezosevogazapijef6p90d.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/hayward_pool_heater_service_code_lo.pdfIn PDF document text
    • http://jepisafidezegun.scienceontheweb.net/selenium_python_tutorial_youtube.pdfIn PDF document text
    • http://minozodatatinad.22web.org/what_prayer_to_say_when_someone_dies.pdfIn PDF document text
    • http://pasetbs.xyz/bomemolewagiy55yn.pdfIn PDF document text
    • http://pifafixejizigu.scienceontheweb.net/xixovilulujupuvot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/likosoxetilanunawi.pdfIn PDF document text
    • https://c96d0889-97fb-4213-90a4-a08ae01970e6.filesusr.com/ugd/ed32f2_6f56c3b2ea5a4075b05589e3cf3be579.pdf?index=trueIn PDF document text
    • http://fedubumisuvek.epizy.com/bengali_movie_top_10_site.pdfIn PDF document text
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_f07d7592373342d098c79ab2e13589ee.pdf?index=trueIn PDF document text
    • http://bumejefivoxigo.myartsonline.com/warlock_invocations_5e_xanathar.pdfIn PDF document text
    • https://0c241ebc-151b-48bf-a4db-a9f2ee65d67b.filesusr.com/ugd/c17081_c1f2f5d1318a4b429bf2c96991003954.pdf?index=trueIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_22e511ee2fae48a89202ca4f052e617a.pdf?index=trueIn PDF document text
    • http://viwefar.rf.gd/69183951861.pdfIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_b6e235e1535a4fb58bcec11bf9fe2ea7.pdf?index=trueIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_80e401d025954cdb86bc8369cdd7aaf0.pdf?index=trueIn PDF document text
    • https://c8019651-2137-4367-b38e-775fff3f8a75.filesusr.com/ugd/fc5a02_fadaa726270841ea9c808c0bd181c8fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavobawum/rebowavig.pdfIn PDF document text
    • https://fe426b01-1dd0-498a-b08e-7ec37e320b94.filesusr.com/ugd/6b45f0_d1e4232c31eb4b5e86a9f9c133af5b69.pdf?index=trueIn PDF document text
    • http://naledabizozede.epizy.com/99992884410.pdfIn PDF document text
    • https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_4eeeac5775ab466e995f64f0484b05da.pdf?index=trueIn PDF document text
    • http://gaditimotef.rf.gd/ramoboz.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_off0000ef19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF19 5152 bytes
SHA-256: b6a51ed00adad4d41febf303bf94c256de0e40ca5f485842730caa5b568716f1
font_01_sfnt_off000100ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AD 10524 bytes
SHA-256: 80732a1fe02b999aadc7f0de213612d3f231ccc5c89c53096930409b6050f577

Open this report in the interactive analyzer, or submit your own file for analysis.