Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca3c0ad2f0661b69…

MALICIOUS

PDF

69.8 KB Created: 2021-06-01 17:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: babee18b45fe66999afd118df523ee64 SHA-1: d65c4f58395decc4e3ce4e4f1b37ca7cd5ebbf40 SHA-256: ca3c0ad2f0661b696e7200ae0304b7e70ab8303b50cd03399667d210b126e770
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://drafthe.ru/pbw?utm_term=how+to+renew+my+passport+online+in+uganda', is presented in the document body, suggesting a lure for users seeking passport renewal information. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://drafthe.ru/pbw?utm_term=how+to+renew+my+passport+online+in+uganda
    • https://cdn-cms.f-static.net/uploads/4493266/normal_6017027a987d4.pdf
    • https://cdn-cms.f-static.net/uploads/4454299/normal_603b6bd4c944b.pdf
    • https://veraroligesabo.weebly.com/uploads/1/3/4/3/134377370/f614453.pdf
    • https://mafukizagodixep.weebly.com/uploads/1/3/4/5/134525221/wajilevidegex.pdf
    • https://cdn-cms.f-static.net/uploads/4366040/normal_6018a7dbccca9.pdf
    • https://zuwuroxiver.weebly.com/uploads/1/3/1/0/131070979/452087.pdf
    • https://gisimezibeze.weebly.com/uploads/1/3/0/8/130874543/7d94355f5bbde.pdf
    • https://cdn-cms.f-static.net/uploads/4457881/normal_5fdb0e6842843.pdf
    • https://vutajavegev.weebly.com/uploads/1/3/4/0/134040502/fonejizanoziwob.pdf
    • https://cdn-cms.f-static.net/uploads/4405440/normal_60623dd9130f7.pdf
    • https://cdn-cms.f-static.net/uploads/4458824/normal_603d30fd2ed80.pdf
    • https://lozofedexipa.weebly.com/uploads/1/3/5/9/135969573/4b69709b.pdf
    • https://static.s123-cdn-static.com/uploads/4389581/normal_5fdd14722111b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zekodunu.pbworks.com/f/xuwibolosakax.pdf
    • http://visetululiv.pbworks.com/w/file/fetch/144415209/nuvipiduvupavejenapabuz.pdf
    • https://uploads.strikinglycdn.com/files/d4ac2a7b-b3d8-4640-bd37-9955ada397f4/things_a_jehovah_witness_cant_do.pdf
    • https://uploads.strikinglycdn.com/files/e73b0101-20d1-4987-8f92-e04c76be6e7d/tejaxibejalapamonume.pdf
    • https://uploads.strikinglycdn.com/files/14dced58-5ab3-4508-b89e-cf984ad70cde/what_is_the_top_speed_of_the_honda_rebel_500.pdf
    • https://uploads.strikinglycdn.com/files/e6ce6421-606a-48db-b391-defb0ca1289b/32233502753.pdf
    • https://uploads.strikinglycdn.com/files/3c557194-e89e-4e1c-8ea6-50b31af1bc0f/how_to_become_a_better_listener_public_speaking.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_off0000d361.bin
7da3839d19732a3490f4800193e82d6b1f45a07e415e9f1f82dd1c0501f01245		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD361 5436 bytes
font_01_sfnt_off0000e5d8.bin
c352abcec6e242fac64ec8cbb79dc7a32bfb1772cc5de0de13eace72c0a66468		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D8 10488 bytes

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