Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d6c353c2d3f55a…

MALICIOUS

PDF

107.3 KB Created: 2021-04-07 20:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bd16ffa2867fda791f9605b0bd61f0e SHA-1: dba765e6f6a89dc212d5294f644b03e8fd3180fe SHA-256: 25d6c353c2d3f55a52bb8b6da5cf6d0f5384990733fcadf64f3caff67aafb12e
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains heuristics indicating it is malicious and uses a remote-support tool lure, suggesting it aims to trick the user into installing potentially unwanted software or granting remote access. The embedded URL `https://resalured.ru/wix?keyword=citizen+eco+drive+watch+e820+instructions` is likely part of this lure, directing the user to a phishing or malware distribution site. While no scripts were directly extracted, the nature of the lure and the ML classification point towards an exploit or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://resalured.ru/wix?keyword=citizen+eco+drive+watch+e820+instructions
    • http://lnstagram-blue-badge-form.com/45812961977ymmj3.pdf
    • http://uabiomanix.xyz/zona_de_desarrollo_proximo_y_andamiajep9jhw.pdf
    • http://trysucre.pro/39087292149vtkjg.pdf
    • http://reduslimitaly-ufficiale.site/neguvamu1n9yp.pdf
    • http://mx50off.info/93493967776im21m.pdf
    • http://homearfes.com/biluzowibekhbfa7.pdf
    • http://pro-gram.pro/57488223323r6m4p.pdf
    • http://copytoshka.ru/gandhi_video_guide_answerstw8gf.pdf
    • http://uscreditmonitoring.info/how_to_update_livewire_tsxr218.pdf
    • http://ligugiban.scienceontheweb.net/niligerusavuliru.pdf
    • http://hdvideo.design/flowchart_maker_frees4hd2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/c4ba2c29-6f33-41f6-9516-4687f545fe50/58770335673.pdf
    • https://uploads.strikinglycdn.com/files/e2ed5200-898b-4d17-b143-c918afa4cde7/wojuwirasobanonesirewog.pdf
    • https://uploads.strikinglycdn.com/files/4ac801a7-fddd-40fb-a955-3e897a3ee0b6/united_colors_of_benetton_shirts_online_india.pdf
    • http://xomutojekes.myartsonline.com/21792873005.pdf
    • https://uploads.strikinglycdn.com/files/edabe3de-6c43-4fa4-8897-175d61406939/41928258468.pdf
    • https://uploads.strikinglycdn.com/files/caab6a5e-f2ed-415b-a0b8-f86aae9244f1/n600_netgear_review.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1bb.bin
d07b33e10e22e334264d8ad0aa93dd05b2bd886868415c1b964c205e8ef9e84a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BB 42672 bytes
font_01_sfnt_off00015550.bin
96323982b796314efce461a248ce8006ade53d1fdaef05dd65ae874d89ef0726		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15550 5568 bytes
font_02_sfnt_off00016855.bin
2e10ec774d31ed62df98c3f82ffeb0446779083a1c2f14478a55a714f233fa6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16855 11948 bytes
font_03_sfnt_off00018fae.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18FAE 4324 bytes

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