Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3b086a48020ffc…

MALICIOUS

PDF

92.7 KB Created: 2021-03-28 20:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fbd5f8377c354bbef185572760b725a8 SHA-1: 85a0a4208b8889a369182d94232e2bf1df521924 SHA-256: ba3b086a48020ffcebd2b25b7d6d0032a674d104d9f024e08d44b2cf59c83a18
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to 'research on benign prostatic hyperplasia pdf'. The presence of an external URI in a PDF, coupled with the ML classifier and ClamAV detection, strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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/award?keyword=research+on+benign+prostatic+hyperplasia+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419206/normal_5fe68b0c724d2.pdfIn PDF document text
    • http://xiguxivevov.sportsontheweb.net/banking_awareness_arihant_download.pdfIn PDF document text
    • http://betifogolejom.iblogger.org/chicken_risotto_nutritional_information.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446774/normal_5ffc96ef87248.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393763/normal_603b6d30a204a.pdfIn PDF document text
    • http://tizelobira.22web.org/21151960547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412887/normal_605278c069056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491671/normal_60126215bb447.pdfIn PDF document text
    • http://nitiwopororotef.mypressonline.com/ayatollah_khomeini_books_in_urdu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://famekuputoda.myartsonline.com/learning_and_teaching_book_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/platform_shoes_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c04327-f81b-4409-b701-7eb0f7828b5d/sweat_equity_agreement_sec.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/dead_by_daylight_android_apk.pdfIn PDF document text
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_025d4c0fb06947e1a3766ec9abda60db.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e47ad4-9319-4bb3-b4ec-95148627de6c/how_to_use_samsung_combi_microwave_oven.pdfIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_de500f3c47ab43c08f29ffefaa9899f8.pdf?index=trueIn PDF document text
    • http://biguvuxurezuto.epizy.com/98379010237.pdfIn PDF document text
    • https://e46eb8ae-11b5-47af-91b5-79e2db369635.filesusr.com/ugd/f84671_7ba540cb6d70464e8c8e080611d70b61.pdf?index=trueIn PDF document text
    • http://tatesit.myartsonline.com/potijegupo.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/fema_is_454_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/samamibuxesevosafedasuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/internet_browser_apps_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb319fb1-f4f7-4921-b75e-f8caada62ca8/27628484028.pdfIn PDF document text
    • http://jaterivi.epizy.com/change_the_given_equation_into_slope_intercept_form_ymxb_x2y6.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_off00012ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA8 5668 bytes
SHA-256: a3695369da1e2c4bd93f11c2913c17acf5be3b5f89dfffb4da6d01a343a35a1a
font_01_sfnt_off00013ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FFA 10884 bytes
SHA-256: bb1ef3052d11211d670b8ba8967f02109f7db143ae797a2d1ff682b883dfe9b7

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