Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9570c7278800c8f…

MALICIOUS

PDF

79.5 KB Created: 2021-03-05 02:06:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9589568c52abd370b688fc0b1775987a SHA-1: fb2f43e9ebdc258d8b410054968fef10ea265386 SHA-256: e9570c7278800c8f9de339d9cebf6e1f4f13cfb5a16eeb4ee42b4b24407ada45
134 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains multiple external URIs, including one pointing to 'fokemale.ru', suggesting an attempt to redirect users to malicious content under the guise of providing a free download. The document body, though heavily obfuscated, contains keywords related to downloads and the authoring application, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/wix?keyword=longman+reader+9th+edition+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476427/normal_5fd3a16f14b3e.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/iaQSRhg/zimsec_history_paper_1_november_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418175/normal_5ff5ec8930ab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_6009e32479d5e.pdfIn PDF document text
    • https://cdn.sqhk.co/guzorata/ic7aih4/60474761580.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421957/normal_5fe577e50bc52.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/bjehbO6/iu_kpop_album_offline_music_app.pdfIn PDF document text
    • http://tigefezatolipeb.iblogger.org/nolufibat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386084/normal_6035937e98106.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/HRiaWig/82683433178.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dejenirapavo.rf.gd/47065436540.pdfIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_a8cc3614bce849d8848566c5d9d6ee06.pdf?index=trueIn PDF document text
    • http://nadowitumo.rf.gd/arizona_diamondbacks_uniforms_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd12c16-3f0c-4afb-9dec-8dcad626b793/94261722168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d912d4be-5f9e-487b-b256-6c137cc621fe/72600537307.pdfIn PDF document text
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_7c7b4c25b78e44b1a06e32b39393c8e6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09126c62-1dec-4a3c-8f9f-753ce3cc4c2f/netgear_wnr3500l_v2_openwrt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ccdfd83-0662-482d-9118-3aed51aaf723/vokusupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80a3fbf7-29aa-404c-b1eb-f24d84877a3f/89574452061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/147610af-1d6e-454d-a799-0ec3513be05a/swann_security_cameras_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c01f4d37-9bc6-41ac-90bc-5b34b5d8b9cc/52972872858.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_off0000f7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B2 5464 bytes
SHA-256: 2a3cc59e1aac1d11c9a41d3663e57c389fcb078022de7a483f06d604fe3434af
font_01_sfnt_off00010a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A35 10716 bytes
SHA-256: 6a2485c964bf7ab7976cdfccbfdb54e3c3cbc9e0de9016c55ec6fd45646d912d