Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ea8a3515bbd6f1…

MALICIOUS

PDF

70.4 KB Created: 2021-03-27 16:21:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 918b11832f7fc10c22338f4aefc4e749 SHA-1: 6237e8abd8c98de08e14cb1f0c6af94bd21c0524 SHA-256: d5ea8a3515bbd6f1d1b875a90fd8551b25bcc4083fe8c8699819577c5bca0c20
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'bologen.ru', which is likely a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of the URI suggests an attempt to redirect the user to a malicious external resource. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URI.

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://bologen.ru/wb?keyword=dunkin%20donuts%20small%20iced%20caramel%20latte%20calories
    • http://xagowawusik.66ghz.com/sovajakurugujug.pdf
    • http://didopikorubozav.iblogger.org/majitovuwujukagew.pdf
    • http://nakijeku.mygamesonline.org/all_full_form_of_computer_download.pdf
    • http://sutarakikim.scienceontheweb.net/algebra_1_math_problems.pdf
    • http://jifosorov.22web.org/92838256093.pdf
    • http://kebawabo.22web.org/webemepiket.pdf
    • http://nawumamarupojo.22web.org/how_much_is_the_salary_of_flight_attendant_in_pal.pdf
    • http://vejawezodasupax.22web.org/jenipijojeforid.pdf
    • http://ziwigosopijulal.mygamesonline.org/balthazar_score.pdf
    • http://murezisafedamaw.22web.org/sulefexuso.pdf
    • http://fesavuxofogegil.iblogger.org/32699581964.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b1d5b846-d7ed-48ca-bb76-b2dff672978c/brandywine_spca_facebook.pdf
    • https://uploads.strikinglycdn.com/files/a62bc0b6-9103-4f9e-81fe-e209a5a848ff/wegojikuzasujaremevupekel.pdf
    • https://uploads.strikinglycdn.com/files/bea2e096-1c70-47dd-bb3e-957ba378f862/44710936780.pdf
    • http://gofosuxubajo.epizy.com/bipuzurev.pdf
    • https://uploads.strikinglycdn.com/files/aa14c417-bd11-40ba-91d5-2b28e6451703/how_to_clean_black_and_decker_crisp_and_bake_air_fryer.pdf
    • http://zimuvazen.rf.gd/how_to_open_lenovo_t430.pdf
    • http://tulakitukubipi.epizy.com/measures_of_center_worksheet_answer_key.pdf
    • http://jimifodapamusos.rf.gd/fisit.pdf
    • http://faxunarin.epizy.com/husqvarna_weed_eater_128cd_head_removal.pdf
    • http://mifojizu.myartsonline.com/adobe_reader_9_password_protecting_a_file.pdf
    • https://uploads.strikinglycdn.com/files/b2fac4b2-df2d-446c-a970-c5d8f61b9612/adobe_premiere_pro_cc_2017.pdf
    • http://damoserik.epizy.com/bukosalularugewodulo.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_off0000d77a.bin
ebd6b9d8ae65bdbe5a89da47be948e2602a0a1ec681bf36fdf5b02a944ac8a4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD77A 5148 bytes
font_01_sfnt_off0000e8e9.bin
f57c58883cd7ca925592d782108c33c2663c3c669711d49a526048800c49d785		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E9 10144 bytes

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