Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e629afee3f9e21…

MALICIOUS

PDF

77.0 KB Created: 2021-05-23 08:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebe695ab2d2f198df4092c21d64ceff7 SHA-1: 754c4eb4881a021edb338b8cb0633980fb789e51 SHA-256: b0e629afee3f9e21d28fdab34d2281a08a225b4392f10c6309f7213cc7ba7941
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a URL that appears to be a lure for downloading a file, indicated by the 'utm_term' parameter and the heuristic 'SE_DOWNLOAD_BUTTON'. The document body, though heavily obfuscated, contains text related to downloading 'mini militia mod', suggesting a deceptive download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=mini+militia+mod+by+sahad+ikr+free+download
    • https://cdn-cms.f-static.net/uploads/4369522/normal_605f81c04c3d1.pdf
    • https://cdn-cms.f-static.net/uploads/4455178/normal_6050e6185c9c3.pdf
    • https://static.s123-cdn-static.com/uploads/4446027/normal_6009abead0075.pdf
    • https://cdn-cms.f-static.net/uploads/4486036/normal_605d4fe41e89a.pdf
    • https://static.s123-cdn-static.com/uploads/4453108/normal_5fc6aed83126d.pdf
    • https://cdn-cms.f-static.net/uploads/4460243/normal_6029a8e5bc7c2.pdf
    • https://cdn-cms.f-static.net/uploads/4383464/normal_601128cb83453.pdf
    • https://cdn-cms.f-static.net/uploads/4455196/normal_60253a968eecd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/voxipanovigepiv/98765786652.pdf
    • https://s3.amazonaws.com/jevelel/adobe_photo_scanner_apk.pdf
    • https://uploads.strikinglycdn.com/files/6d73ea1b-1535-4a26-bc00-0a1967100b16/3551305592.pdf
    • https://uploads.strikinglycdn.com/files/128d653f-8f85-409c-b5dd-5d15ee615778/33807241190.pdf
    • https://s3.amazonaws.com/jagux/81091598888.pdf
    • https://uploads.strikinglycdn.com/files/3d35b36b-6dd5-45ba-98e0-9805037617a2/how_to_get_a_technical_writing_job.pdf
    • https://uploads.strikinglycdn.com/files/4bbe9a2d-379c-43e4-ae89-9bb9fa043d18/best_movies_like_fifty_shades_of_grey.pdf
    • https://s3.amazonaws.com/zubata/23549980050.pdf
    • https://uploads.strikinglycdn.com/files/ff1ce2b5-bf79-4dfc-baf3-b836c983a29e/1379790069.pdf
    • https://s3.amazonaws.com/wexoteluwag/warelamawikukarijiferalu.pdf
    • https://s3.amazonaws.com/sabegokek/dularo.pdf
    • https://s3.amazonaws.com/besafefaf/gokekez.pdf
    • https://uploads.strikinglycdn.com/files/65fecf3d-56a3-4e79-944f-018d3be2e2b6/fefakemawugobekepodew.pdf
    • https://s3.amazonaws.com/polexebuj/aoe_2_google_drive.pdf
    • https://s3.amazonaws.com/wikurixobelu/71003405139.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eff6.bin
7b7a91f599b0ae981716f530f8d4367bb7755ae2517926a41afdb9b00f60ccfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF6 5552 bytes
font_01_sfnt_off000102c3.bin
667dffaa3e21ef37be25c7f19c86fb94c8988743b71d24b1ff28440525212581		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102C3 10480 bytes

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