Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8e0c56be681435…

MALICIOUS

PDF

85.8 KB Created: 2021-07-01 09:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0a309d74907fd8fb77f378b5a49a41c1 SHA-1: a5cfe05599ee68dc87a493314ed5b2e093d71210 SHA-256: fe8e0c56be68143573c55ba8c8b3ddeb6c8a9aa1d1c34635ea210d370137a025
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for a phishing trojan and an ML classifier indicating high maliciousness. The presence of embedded URLs and the 'SE_CALLBACK_LURE' heuristic strongly suggest a callback phishing or tech-support scam, where the user is prompted to call a malicious phone number. While no scripts were explicitly extracted, the PDF format can embed JavaScript, which could be used to further the malicious intent, such as displaying deceptive content or initiating communication.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://garglob.ru/uplcv?utm_term=new+hampshire+income+tax+rate+2021
    • http://kuzfarm.ru/images/file/21921411584.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f0df23450---rezalalopubemuwan.pdf
    • http://asianmosaicnyc.com/userfiles/file/wiwedevobusinijito.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/q6v5g76d6uvncvh1hp93ugjgo4/kabixutofaratufodefa.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a22ab7dc335---povumuwetig.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/7f479ea05371ea2ff7f891880583db6a/21114077236.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/ookl3gs914frvbvg14bkgv4kao/67382234259.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/5713e14a69a5e867cf210bb09fe1ca22/woxikotovax.pdf
    • http://wenxuezj.com/images/File/74142293361.pdf
    • https://aartipalette.com/userfiles/file/jofogonazozikevu.pdf
    • https://ludifrance.fr/userfiles/file/67260463632.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b93d03d82f8---5870702530.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1134b17512---94564109708.pdf
    • http://ankurgroups.com/userfiles/file/dilisesoxovevu.pdf
    • http://residencecarlofelice.com/userfiles/files/41926390636.pdf
    • http://tfh-filter.hu/_user/file/tuxurawarajixi.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a9bade6b378c221063e340a7be98d505/telet.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/f2bd18a026430ebd4c37973895fed768/79333825940.pdf
    • https://upbilbao.com/ckfinder/userfiles/files/81367139421.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd76b2b46f---munikevuwites.pdf
    • http://bmsorganica.com/userfiles/file/bokiworizoxeb.pdf
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/0f64eb504c9cb91f1b4dc1334abca004/golubopesasutas.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eab3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB3 16792 bytes
font_01_sfnt_off000102c5.bin
dd335fb32c127d9bf7e72b485005024a8e8b5cb8aeb8b20edf60dc340ee70565		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102C5 17340 bytes
font_02_sfnt_off0001305a.bin
d6dc18bc801935e871027005c91bb1c8462c60b4e857680036477c5f2d2c7018		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1305A 11052 bytes

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