Malicious PDF — malware analysis report

Static analysis result for SHA-256 929c2b2b3eaac09f…

MALICIOUS

PDF

126.0 KB Created: 2022-06-10 05:06:43 +02:00 Authoring application: valafair (via PDF Master 1.0.1) First seen: 2022-07-15
MD5: a6a15e5fd71a9724af2d9b41b8569db0 SHA-1: 96b8f231e0ee14a75abe443405a70b674bf2ad86 SHA-256: 929c2b2b3eaac09f51c5ccad07f11baeadfd040f2f777274dda9986f7ff8f76c
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm designed to distribute malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway security. The primary URL 'http://evacdir.com/ZG93bmxvYWR8VW8yTmpKNmJYeDhNVFkxTkRjNE1EZzNPWHg4TWpVM05IeDhLRTBwSUhKbFlXUXRZbXh2WnlCYlJtRnpkQ0JIUlU1ZA/dello/manners?RW1lZGlhIENhcmQgRGVzaWduZXIgQ3JhY2sgS2V5IEtleWdlbiBDcmFjawRW1=palest&recipies=easyhomeremedy' is likely the initial download point for a secondary payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0203

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://evacdir.com/ZG93bmxvYWR8VW8yTmpKNmJYeDhNVFkxTkRjNE1EZzNPWHg4TWpVM05IeDhLRTBwSUhKbFlXUXRZbXh2WnlCYlJtRnpkQ0JIUlU1ZA/dello/manners?RW1lZGlhIENhcmQgRGVzaWduZXIgQ3JhY2sgS2V5IEtleWdlbiBDcmFjawRW1=palest&recipies=easyhomeremedy
    • https://telebook.app/upload/files/2022/06/73R28GR3bQ4vn9hYB6M2_10_fbca4cc924f19e32370ff0ea8f2039ee_file.pdf
    • http://www.eztkerested.hu/upload/files/2022/06/O3nP7VWjQfA2mYummqYn_10_7bd77ad1409a479f19dd267589b52f98_file.pdf
    • https://vitinhlevan.com/wp-content/uploads/2022/06/Ks_B_0845pdf.pdf
    • http://aeptel.com/wp-content/uploads/2022/06/Su_Podium_V251_Plus_TOP_Crack.pdf
    • https://www.hubeali.com/?p=8139
    • https://beautyprosnearme.com/password-call-of-duty-3-rar/
    • https://jobavenue.net/?p=9354
    • https://nusakelolalestari.com/wp-content/uploads/2022/06/DIGSI_5_V628___EQUIPAMENTOS___Saft.pdf
    • https://pakyellowbuz.com/wp-content/uploads/2022/06/Nero_Burning_Rom_2018_Free_Download.pdf
    • https://likesmeet.com/upload/files/2022/06/whQiukFh9d9NeB4kHcmD_10_fbca4cc924f19e32370ff0ea8f2039ee_file.pdf
    • http://www.ndvadvisers.com/ge-fanuc-versapro-hot/
    • https://delcohempco.com/wp-content/uploads/2022/06/Hi_can_any_one_help_me_to_install_the_correct_driver_for_a_ESS_Solo_1_ES1938_PCI.pdf
    • https://www.acvconsultoria.com/wp-content/uploads/2022/06/Frozen_Tamil_Dubbed_Movie_Fixed.pdf
    • https://mxh.vvmteam.com/upload/files/2022/06/jsJJTryIhGWP8oRO8vAU_10_7bd77ad1409a479f19dd267589b52f98_file.pdf
    • https://boardingmed.com/wp-content/uploads/2022/06/Tomorrowland_Dual_Audio_Hindi_Eng_720p.pdf
    • https://www.podiumrakyat.com/wp-content/uploads/2022/06/via_s3g_unichrome_pro_igp_driver_download_win_7_64bit.pdf
    • https://auroracos.com/wp-content/uploads/2022/06/Midisoft_Drivers_64bit_v110_for_NET_WIN7_Midisoft.pdf
    • https://imaginacolina.cl/championship-manager-2008-full-exclusive-iso-pc-version/
    • https://purosautoskansas.com/?p=34779
    • http://barrillos.org/2022/06/10/windows-xp-sweet-6-2-final-francais-iso-673-full/
    • http://www.tcpdf.org
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.aiim.org/pdfa/ns/extension/
    • http://www.aiim.org/pdfa/ns/schema#
    • http://www.aiim.org/pdfa/ns/property#
    • http://www.aiim.org/pdfa/ns/id/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00001666.bin
a217f12862e0ff75203bdd4136ca0d68471050be46bb09aed5306898926ffdd4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1666 120140 bytes

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