Malicious PDF — malware analysis report

Static analysis result for SHA-256 30bdab7eaf58d017…

MALICIOUS

PDF

81.7 KB Created: 2021-05-19 17:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c978025d2bf594fc772b1ae92b470f1a SHA-1: 1f1a148588eae7c85cbfbbe8cdb0f33230ae1c41 SHA-256: 30bdab7eaf58d0170e60717978956e3ef51e3854b9f3c7ef7eb1fa73a80f1996
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of a download-like button lure further supports the phishing or malware delivery scenario.

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://seumenha.ru/strik?utm_term=regular+and+irregular+verbs+worksheet+grade+2
    • https://cdn-cms.f-static.net/uploads/4450632/normal_6036e10506328.pdf
    • https://cdn-cms.f-static.net/uploads/4470552/normal_60488bc0abb3a.pdf
    • https://bexajaruxomape.weebly.com/uploads/1/3/1/3/131384789/ca425c26d0d.pdf
    • https://xidamosu.weebly.com/uploads/1/3/4/7/134707329/1541285.pdf
    • https://natadafupekex.weebly.com/uploads/1/3/1/8/131856288/wovopomegivakego.pdf
    • https://rafinavogeseb.weebly.com/uploads/1/3/5/9/135987446/roxina.pdf
    • https://vufuvato.weebly.com/uploads/1/3/4/7/134718288/rawirotudibokuvebop.pdf
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/nutafejosanunabip.pdf
    • https://wazafalesozem.weebly.com/uploads/1/3/4/4/134498636/e5294e6737.pdf
    • https://static.s123-cdn-static.com/uploads/4387586/normal_5ff104dd7570a.pdf
    • https://moliveje.weebly.com/uploads/1/3/5/3/135323163/fafigigixubijat.pdf
    • https://sujofunipus.weebly.com/uploads/1/3/4/5/134502209/lafidavusowa-lufumajisip-nirimikuzez-zofegemadeve.pdf
    • https://cdn-cms.f-static.net/uploads/4474988/normal_602698639a092.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5b5c35bd-92a9-4566-a5fa-39231a0de8e0/melezob.pdf
    • https://uploads.strikinglycdn.com/files/4d4328dd-b4f2-4bfe-8391-1faf2e041fb4/the_importance_of_being_earnest_famous_quotes.pdf
    • https://uploads.strikinglycdn.com/files/cde3adb3-2bbb-4c31-b9f5-afc11e74a533/the_integral_of_cosine_squared_x.pdf
    • https://s3.amazonaws.com/bawalidamovidud/dota_2_hero_build_guide.pdf
    • https://uploads.strikinglycdn.com/files/681e8a22-02bf-4d9c-bee7-d18b3420ac97/how_to_market_a_small_engine_repair_business.pdf
    • https://s3.amazonaws.com/panalipolifod/formal_letter_australia.pdf
    • https://uploads.strikinglycdn.com/files/3d2a43bc-be91-4991-8189-04a8b9978136/23994998005.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e39b.bin
45e62b57dc9a6c48ab8949e821504a5ff5973d2b7a7c91973e0a48373c58257b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE39B 5584 bytes
font_01_sfnt_off0000f6aa.bin
0f740872c9ba99ba2808e86ca1aa710947acf25eef927d3004a187dd3557d740		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AA 2092 bytes
font_02_sfnt_off0001004f.bin
7cc86b6dc01b12bc8bcc78c0fb9f4678eb6f67b98970954b699791a27cbb6910		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1004F 9960 bytes
font_03_sfnt_off000122aa.bin
18820e64b89489c6901bdbad9637cefc87d81bb55776bf10726fbc7439458c45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122AA 16336 bytes

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