Malicious PDF — malware analysis report

Static analysis result for SHA-256 1225d51b2f604282…

MALICIOUS

PDF

82.6 KB Created: 2021-02-27 08:33:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcf69d520764bd561e5db60ccd100eb1 SHA-1: b431e9ab9ed07c5110640c477c34d208f6182e2c SHA-256: 1225d51b2f604282f21b6d858bb0ba122ac36abbbf7d41c1a77a63f2410aab9d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, many of which are part of a link farm designed to improve search engine rankings. One prominent URL, 'https://xezojetit.ru/123?utm_term=maze+runner+3+full+movie+download+in+hindi+480p+mkv', suggests a lure related to downloading media content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/123?utm_term=maze+runner+3+full+movie+download+in+hindi+480p+mkv
    • https://bukajovogasis.weebly.com/uploads/1/3/4/3/134340533/keleditepejesoliduzu.pdf
    • http://kirakexig.mypressonline.com/49554264982.pdf
    • https://cdn.sqhk.co/mixaluwekitu/pKJfgfS/fopibimedi.pdf
    • https://nakofasojerurog.weebly.com/uploads/1/3/4/5/134592478/f4eccde.pdf
    • https://neloramobipetez.weebly.com/uploads/1/3/1/4/131407165/rofesuganuxipoz.pdf
    • https://cdn.sqhk.co/sabimejuka/eKjeic8/65094880925.pdf
    • https://cdn.sqhk.co/daborofus/iblVI1K/stickman_racing_games.pdf
    • https://tixemuxizufog.weebly.com/uploads/1/3/4/7/134746981/daradi.pdf
    • https://jurajewokikum.weebly.com/uploads/1/3/5/3/135349146/2524ec2.pdf
    • https://cdn-cms.f-static.net/uploads/4368471/normal_601624a8443af.pdf
    • https://rafopovuweke.weebly.com/uploads/1/3/2/7/132740485/3fd03.pdf
    • https://cdn.sqhk.co/voxedijudibo/Didheji/jebewusetevakafobiwuv.pdf
    • http://wimuzawoxi.getenjoyment.net/formal_report_writing_example_for_students.pdf
    • http://dujojiwasemob.mywebcommunity.org/letiwotefozemavofaxibi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zitadufafasid.onlinewebshop.net/a_christmas_carol_short_version_esl.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e707.bin
b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE707 6744 bytes
font_01_sfnt_off0000f7ec.bin
8a04b89b12740b1e44aa5b41d36b4e5064d35c23b5c5f34bcfd556e2804bdb55		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EC 5964 bytes
font_02_sfnt_off00010c35.bin
aa54cde9e36263ecadc91b349dc61f8e54c629802f094d33dff838cbca496332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C35 1704 bytes
font_03_sfnt_off000114b6.bin
ee36549981359b7667aa220e9459abf238038aa29fc64df394f40f9e3d15239c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114B6 11088 bytes

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