Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e1ce66d5e721fb…

MALICIOUS

PDF

72.4 KB Created: 2021-04-01 17:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e1450db977d4ef527b60d3406a8d0b37 SHA-1: d2b3d726ad9f673a3d9202e196016051bc4c8e12 SHA-256: 81e1ce66d5e721fbe5003482565aeeac94e2d770322764d98b672a5816188468
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one prominent URL pointing to a domain associated with phishing activity. Heuristics indicate the PDF is a link farm on disposable hosting, and ClamAV detection confirms it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://lozipotod.ru/award?keyword=ielts+recent+actual+test+vol+2+pdf PDF link annotation
    • https://cdn.sqhk.co/fexilejedit/pifOggZ/wukafikakivoxufipixew.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://cdn.sqhk.co/telivagawu/aQzgjmU/brick_game_9999_in_1_emulator_download.pdfIn PDF document text
    • http://bidetoluji.getenjoyment.net/68746807532.pdfIn PDF document text
    • http://fimewot.xyz/vidmate_app_free_for_android_uptodownoww9a.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/59541615564.pdfIn PDF document text
    • https://cdn.sqhk.co/gadujotev/fhiqGgj/dawon.pdfIn PDF document text
    • https://cdn.sqhk.co/buzovegom/LcichcH/86646690930.pdfIn PDF document text
    • http://vekowen.getenjoyment.net/arcgis_10._5.pdfIn PDF document text
    • http://kieverts.xyz/wojunqz47v.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/timeziso/menanisejenefijawatel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e133bc48-060b-43e4-b8ab-92888737b3b9/nekupexafove.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/94930377948.pdfIn PDF document text
    • http://likasuretaw.onlinewebshop.net/katixokodixaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07e0adc4-0960-4cb3-a0c2-92c28a5b5cbe/prisoner_b-3087_quotes.pdfIn PDF document text
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_3d4454b8a3b6424085cb76f674f1d6a9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb422f14-7b41-4164-8531-fba8e1f80454/lukewetisosejogux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3321f88d-8329-4c2a-8581-dcd9aa10c875/strongs_concordance_hebrew_333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af2950a-db2b-4d2d-9238-d69a84d30b74/3628107008.pdfIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_19c6dd6459684d37ae594cb54c3f4b9c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/48_laws_of_power_vs_art_of_seduction.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/call_recorder_app_for_iphone.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD163 5280 bytes
SHA-256: f58391e80d00d3f1d0df5e5c333d18b7cea4065519fe22206d94c44ea77faaf3
font_01_sfnt_off0000e36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36B 1796 bytes
SHA-256: d9f96797a54aa890ffc864a62d0ee1bea369dc139b9f5922dbee51669d5f236a
font_02_sfnt_off0000ebf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF7 11488 bytes
SHA-256: be1c878621f1bf5bc62ba0d1317995fa9261cf852ef2b75427d8dd63d645b99e

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