Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1dd2c915e877df4…

MALICIOUS

PDF

65.0 KB Created: 2021-02-17 07:43:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f2105531d9e5980ecb73e37fa07a8f76 SHA-1: ed33057ff32beb30994db9df2286c7f3b2c9db08 SHA-256: d1dd2c915e877df474aaa8d0a31cfb9e4751c018bb0dd27db96914c69932c3c7
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a machine learning classifier and ClamAV as malicious. It displays a fake CAPTCHA, a common social engineering tactic to trick users into interacting with malicious content. The document also contains an embedded URI pointing to 'baarspo.ru', which likely serves as a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://baarspo.ru/wix?keyword=houses+for+rent+in+chesapeake+va+no+credit+check PDF link annotation
    • http://mangalvpodarok.ru/abordagem_burocratica_da_administraowa4e9.pdfIn PDF document text
    • https://cdn.sqhk.co/moxawitab/jagdhbT/87467525926.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408983/normal_5ff25c0f8c6f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_6022093894248.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/zOifG5g/penanoni.pdfIn PDF document text
    • http://fruitik.space/bowofoxulaqvdy8.pdfIn PDF document text
    • http://spindlndou.space/91682549968avjhd.pdfIn PDF document text
    • https://cdn.sqhk.co/lanamixese/djbigji/1524438476.pdfIn PDF document text
    • http://cooldomen.space/40377181395g8jps.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pobixedele/regulatory_reporting_analyst_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/ap_calculus_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/xexepowiwavuwevi.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/xiwofuvofixarabanag.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC116 5296 bytes
SHA-256: 788cb30d1bbd7004289bb054f1284d257147dd43cd8cd3d22908ca0c5b817c42
font_01_sfnt_off0000d31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31E 10872 bytes
SHA-256: 7a87d34b06fba6209bf35fc1b637740340b6e3013ad23447cabcc955b3f548d8

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