Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc1b92d0285e9723…

MALICIOUS

PDF

75.5 KB Created: 2021-03-17 19:37:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f8845336254db330e7fa5cb2368b047f SHA-1: 0889ba1e95398b6c29b0c0d1046e0ef2d0355a6c SHA-256: cc1b92d0285e972384cddf42166dedf01d380aa27d928a8b9ad605419081f1d9
96 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The embedded URL, https://midufefew.ru/award?keyword=sandvik+cutting+tools+catalog+pdf, is the primary indicator of malicious intent, suggesting a phishing or malware distribution lure. No scripts were extracted, but the PDF structure and URL indicate a likely attempt to trick the user into downloading a payload or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/award?keyword=sandvik+cutting+tools+catalog+pdf PDF link annotation
    • http://megaparegeduze.iblogger.org/50349455869.pdfIn PDF document text
    • http://gidujoluj.mypressonline.com/lebexuzigawiluwepizaxube.pdfIn PDF document text
    • http://sinanomi.22web.org/reaes_dos_alcoois.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/how_to_get_a_medical_receptionist_job.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473954/normal_5feff5f252007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465555/normal_602827a2a263a.pdfIn PDF document text
    • http://sebevifa.getenjoyment.net/zerodha_varsity_module_5.pdfIn PDF document text
    • http://zodazaze.22web.org/homebrewery_image_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382621/normal_5fe36b4345642.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409417/normal_5fec34b78e597.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407301/normal_5ff3cd6424550.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nononulavojiki.myartsonline.com/46203895374.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/45366681104.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/doj_antitrust_division_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/8430902723.pdfIn PDF document text
    • http://bikuxawas.epizy.com/que_es_mecanica_automotriz.pdfIn PDF document text
    • http://mukukukeban.rf.gd/95155933398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fba714f-b1d5-47b4-b647-5a47bd77892b/tunujot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b8f82fe-2cc0-4dce-b86c-fd401e2ed2e9/ikea_usa_catalogue_2018_english.pdfIn PDF document text
    • http://finezifor.rf.gd/how_to_install_a_basic_thermostat.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/28609260063.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/video_er_firefox_android.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_off0000e964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE964 5456 bytes
SHA-256: 118494e3be9adadf17749134e55c30b238a6ef5f320badfe5d2a75f737924242
font_01_sfnt_off0000fc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC19 10976 bytes
SHA-256: bda1937186426a7100a00df278364a36d183dccef606216fa450c883e8a4c954

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