Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea103ce0cd7ebbf…

MALICIOUS

PDF

74.0 KB Created: 2021-03-15 14:49:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5461d82eba2bc29ca2105063fc4a201 SHA-1: 2f05620cc49acfd7d28826c6d448056c16f4d633 SHA-256: bea103ce0cd7ebbf6e9438e0d6b34bdac4635a51b2eb24eca52bd4fd39f4bb76
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which are likely part of a link farm designed to distribute malware or conduct phishing. The primary malicious URL identified is https://maypoin.ru/wix?keyword=clash+of+legends+mma, which is likely used to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=clash+of+legends+mma
    • https://cdn.sqhk.co/wimedizi/flriiQa/memurafiles.pdf
    • https://cdn.sqhk.co/zedozomi/QZIqhaY/steering_committee_invitation_template.pdf
    • https://gawubodukajine.weebly.com/uploads/1/3/0/9/130969599/bonudumaratozuzupod.pdf
    • https://cdn.sqhk.co/jinuzekovodi/hKODGU1/61716966447.pdf
    • http://sebokuxaxugu.iblogger.org/42867861183.pdf
    • https://fodigedij.weebly.com/uploads/1/3/2/7/132740281/sevakavebe.pdf
    • https://cdn.sqhk.co/nufesewepi/hdhhHLA/mens_haircuts_long_hair.pdf
    • https://cdn.sqhk.co/vitelodikef/iFBggih/digraph_and_diphthong_worksheets.pdf
    • https://xufaparada.weebly.com/uploads/1/3/4/0/134017939/4379983.pdf
    • http://wozutujetotox.iblogger.org/55243183797.pdf
    • https://zevigutuxokalu.weebly.com/uploads/1/3/4/7/134769804/kozokipon-lexoxudego-suzisozig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_95beea0992484712a8e17e39d302a17f.pdf?index=true
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_0c05b3d5c2704372a28460dcdc3d1446.pdf?index=true
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_2ba561acc60c472fa98a74a67db7b6f6.pdf?index=true
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_44fa9b697f0c4c448f5822dc5dd58049.pdf?index=true
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_f17c45438eab4e2bb61f5c006364379c.pdf?index=true
    • https://de26864d-dd79-4a6d-8467-b5cf435a6969.filesusr.com/ugd/6ff07c_4c2789e1f4854c2c967861b188410d87.pdf?index=true
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_350d02ebf0b44bc1808a052059b7e3ed.pdf?index=true
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_3222a350dbb14692a9a973897b4be5b0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8f5ffacd-34c2-4b73-8651-484034c96943/laxudazolemakenepomeru.pdf
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_a9f200f5b7804ab487ea276d0a211520.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e14d.bin
745f3ca98131b7e0f21a8208aa2e6b223d9f531195081f1a0610e047b0bcf290		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE14D 5128 bytes
font_01_sfnt_off0000f296.bin
553860a5880262cbf7dd907397753ce4faa38b6dfa71100e9d7f368498b7e2c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF296 11408 bytes

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