Malicious PDF — malware analysis report

Static analysis result for SHA-256 7235965e1ffe4582…

MALICIOUS

PDF

76.4 KB Created: 2021-03-19 03:54:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90e66c04689e2e9125dd45229eb2829d SHA-1: 8ae1f1da4dbb59517e3f575b6f6b3ffe45e7a9a6 SHA-256: 7235965e1ffe4582ba13926f0f8312ea0cbaeccf86d7078d1a56ccf1c3f32ac0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URLs identified are 'https://soxebez.ru/wix?keyword=12.+resources+within+the+staging+area' and 'http://finansi-7.online/wutijefulupegorobavotb1ll8.pdf'. These are likely used to redirect users to phishing sites or download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://soxebez.ru/wix?keyword=12.+resources+within+the+staging+area
    • http://finansi-7.online/wutijefulupegorobavotb1ll8.pdf
    • http://fullhp.info/38320891365td7ae.pdf
    • https://lufeziwupidel.weebly.com/uploads/1/3/5/3/135345985/044a1232cd.pdf
    • http://oyuncuxx.com/xorinepitan122i.pdf
    • http://shopmzm.site/juzeruwywjl.pdf
    • http://sport-stavki.fun/663357235369xhzb.pdf
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/guwejot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_a21b9a28043f401da915905fb11e89c7.pdf?index=true
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_543d8fb694524805846dd21a3bb69f30.pdf?index=true
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_9b62687f0ae34087b24f286b406ae6a5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/091a1a90-1c10-4ecf-859f-2e59439243f1/zofugurubilulelim.pdf
    • https://s3.amazonaws.com/daniwodug/addams_family_values_free_movie.pdf
    • https://uploads.strikinglycdn.com/files/8c5e9160-ef44-4da0-9517-99df1c3f919f/craftsman_table_saw_model_113_motor_upgrade.pdf
    • https://ff5ab256-a407-4697-91b9-141751226614.filesusr.com/ugd/4205e4_0e219ee3c6bb4549bdf3e471b2fed7f0.pdf?index=true
    • https://s3.amazonaws.com/bomifabipi/poravawumanexopubo.pdf
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_e1b970856756462fa0700d636553bc59.pdf?index=true
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_9052f9f917be4227b56c27c9d5dadef9.pdf?index=true
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_ce351d0929c44d3485050573167db782.pdf?index=true
    • https://uploads.strikinglycdn.com/files/05017b3c-3c07-4689-94e1-e6ef1729e809/guitar_sheet_music_download.pdf
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_4f59e9465e52419b8d209dc8c8229a8c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9f211b2b-b42c-4950-814d-26c3c79478f2/ruguletojot.pdf
    • https://uploads.strikinglycdn.com/files/2ae04444-562d-463e-beec-affb48e4a8cb/7828052455.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_off0000ee33.bin
39dac10fc663a95971a4a1d71f5ec986074c5a49daf78594f2bb2e0484845a9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE33 5240 bytes
font_01_sfnt_off00010025.bin
0bd685dea5ead0f75b5e6662c58e5b4942f6c3c40670eb1debfd1a6e207d23a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10025 10488 bytes

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