Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68ef095e7f99948…

MALICIOUS

PDF

86.3 KB Created: 2021-06-10 14:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3a1193dd02f507c6f212d9e80ff86f06 SHA-1: ce0539d53e78d0c807fb40b8504a57ab47f283f2 SHA-256: d68ef095e7f999481d23298890b780a42d757349d22dd4ca5d948dc8abc9d128
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://nomylo.ru/pbw?utm_term=the+trial+marriage+husband+pdf+download', which is likely a phishing lure to download further malware. The document body, though heavily obfuscated, contains text related to a download, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://nomylo.ru/pbw?utm_term=the+trial+marriage+husband+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444657/normal_606b5461d2e7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405638/normal_601af9a5a2039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379038/normal_5fd1bfab99aec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459805/normal_6015bd4d41072.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421329/normal_600638fda4181.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_606225d43e0df.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4366964/normal_60b501d038bfc.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4401716/normal_60b1ff3ddcc76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466161/normal_6028f0788789a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_60683a482ef74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/14a9af69-8f12-4349-a69e-27f3edf181f0/10276241257.pdfIn PDF document text
    • http://bezagodo.pbworks.com/f/xitulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43215938-99b6-4186-9480-3b47af50be5d/my_dish_box_keeps_rebooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0ff2321-8dbd-4677-902e-b4e67b92c671/kipipadurisuvimikivi.pdfIn PDF document text
    • http://faxamom.pbworks.com/w/file/fetch/144472620/how_easy_is_the_food_handlers_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aa8d181-b5bb-4e9c-b027-a1b01ca7c419/probability_on_numbers_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62768e3e-49cc-46fa-b45a-1d47f6b4eb58/dork_diaries_tales_from_a_not-so-happy_heartbreaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f97dd9dc-5f7c-4376-9999-9ae57bb052cb/7569317974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc6f8c01-b327-4fc6-995f-7d7ca71ec0fb/18853224549.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE040 5796 bytes
SHA-256: 6540c7c7139369f0e65ef17587aa0349c6f859fe20c0a4c5ff610311ab075285
font_01_sfnt_off0000f45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45A 5636 bytes
SHA-256: e3e13e6bb80a775cb13d31ec380c919b4a691eeca70cb1c5eb936b4653277d5f
font_02_sfnt_off0001075c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075C 1828 bytes
SHA-256: 93be6ffae20bc6daf2b9cedd8b6106235c1054a6214cc2a290c9def1cb5833a8
font_03_sfnt_off00011054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11054 11024 bytes
SHA-256: 3694c5c69121230df49ea83fce2e2822c2647b7a6a74cc18f60d5bf8268323de
font_04_sfnt_off00013614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13614 16060 bytes
SHA-256: d8a1a34de14a7b8fce5e51635835121d353d188f9ac9ce1e11538509fd4c5cdc

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