Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec6bb09f95c5e34…

MALICIOUS

PDF

79.8 KB Created: 2021-03-08 23:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6bd75dc6c171cc6c2ed886d25bfc940 SHA-1: d39d80deecfcc0ee9aad1e01869c03b4c6f7504f SHA-256: 2ec6bb09f95c5e347b5d576ff807f6b3a373b6a1d11f8778178c70da24e9841d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on link farm domains. The primary URL, 'https://jumiwimov.ru/strik?utm_term=how+long+can+a+stray+cat+live', suggests a phishing or scam attempt disguised as a search result. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/strik?utm_term=how+long+can+a+stray+cat+live
    • https://cdn.sqhk.co/tinodifozeza/gcheIge/59248189462.pdf
    • https://cdn.sqhk.co/moviferu/qG5RjfD/tuviwelebebazewugiwoz.pdf
    • http://dodemul.mygamesonline.org/52652920119.pdf
    • https://cdn.sqhk.co/gisusisabez/WjgqVuJ/ludo_all_star_online_classic_board.pdf
    • https://cdn.sqhk.co/tofatuxurejo/dxYMyUv/15389734289.pdf
    • https://cdn.sqhk.co/woxemumi/hjWgiT4/retur.pdf
    • http://tepoparupomo.medianewsonline.com/63873532790.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kepawomokatuke.myartsonline.com/how_to_install_petsafe_invisible_fence.pdf
    • https://s3.amazonaws.com/xezonijida/aufgabenfuchs_binomische_formel.pdf
    • https://s3.amazonaws.com/datarofapakil/niremisorejuwuni.pdf
    • https://uploads.strikinglycdn.com/files/d0ec5bd9-fae5-42e8-bef3-ae82e83e9c21/sifofuwadiw.pdf
    • http://kapirexazi.onlinewebshop.net/13139857644.pdf
    • https://uploads.strikinglycdn.com/files/773d5d67-1728-45da-8cdc-368985625eae/the_far_side_comics_today.pdf
    • https://uploads.strikinglycdn.com/files/05781e36-4514-4570-a416-a9c7b60a3d43/25971050439.pdf
    • http://subogerilazelo.atwebpages.com/vimokukaluzebuduveguwamu.pdf
    • https://uploads.strikinglycdn.com/files/7ab9568d-8f7b-4565-a8fa-60d3ff3a8f39/laguvodexeginonalobo.pdf
    • https://uploads.strikinglycdn.com/files/61a4c39c-9a42-411c-a722-0e2978ffbe42/how_long_does_timex_indiglo_last.pdf
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_7ce73e362ab24d6299ba5929449b34de.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fd2ab692-274f-437d-8089-aea107354df5/mosusik.pdf
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_4ae69da33c7842caaea46ac6e0d2bca7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1950dc7e-8538-4776-8342-320c20dc49de/dinaxelaxusozena.pdf
    • https://uploads.strikinglycdn.com/files/129a1eff-53b6-41f2-ad90-5f3ffb5722c6/71784888655.pdf
    • https://uploads.strikinglycdn.com/files/e8c907d4-cdee-4471-a66e-079c3b9c5365/newtons_second_law_of_motion_worksheet_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeeb.bin
79770b1fc6d2e7449cf37b5beb9d103e399dde8b1fbb89fe5ee4d5cfba8f4258		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEB 4968 bytes
font_01_sfnt_off0000fff3.bin
3c721d55f7e37dd0e5b3b9a8dc66336e9d9311412e97f2031570ab8793ec95cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF3 10396 bytes
font_02_sfnt_off00012386.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12386 4324 bytes

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