Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c3c67f6498199f…

MALICIOUS

PDF

96.1 KB Created: 2021-03-17 03:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d75bc982cff88e979eb8959d573ae47b SHA-1: da178b88938cfc40346dad7e16e14198790cfef8 SHA-256: c2c3c67f6498199feb2a4f641249adfccb01d52947dd416e3bdc3c180f29ade8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'crophysi.ru'. The ML classifier and ClamAV also flagged the file as malicious. The embedded URL is likely intended to trick the user into downloading a malicious payload or visiting a phishing site. No scripts were extracted, but the presence of a malicious URL strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/award?keyword=concepts+of+programming+pdf+download In PDF document text
    • http://ig-about.net/first_90_days_book_reviewaoocy.pdfIn PDF document text
    • http://regse.website/simple_present_tense_exercises_with_answers_doc4vtea.pdfIn PDF document text
    • http://eslife.pro/beechcraft_bonanza_f33a_maintenance_manualfmolq.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/ieAjdhi/kuturoximusakibazo.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/jbmaiat/infrasound_detector_diy.pdfIn PDF document text
    • https://cdn.sqhk.co/pometobab/hgh4zHm/63358667718.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/jcehe00/wiwego.pdfIn PDF document text
    • http://pupezawat.scienceontheweb.net/wopakex.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/caremark_prior_authorization_form_for_proliaksqk4.pdfIn PDF document text
    • http://mexicotop3.xyz/248518819731mzd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tamovagag/32125912211.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/xuzimi.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/bible_verses_in_tamil.pdfIn PDF document text
    • http://mekasesajiw.onlinewebshop.net/aws_certified_solutions_architect_associate_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/ncert_sociology_book_class_11.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/arduino_ide_esp8266.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/95091917809.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/prohibido_enamorarse_de_adam_walker_2.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/indian_railway_abbreviations_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/roofing_project_manager_salary_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/8039550783.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_off00010501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10501 5376 bytes
SHA-256: 106742a5345cf0241f29e45f5e5d21b17af4ab59d46e4c75b700278aba7dc8e5
font_01_sfnt_off0001173a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173A 2936 bytes
SHA-256: 7683ea795749e715aeab57cd25a9cedb0a97160763992a4a4c6d761120a37e63
font_02_sfnt_off000123a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A0 12076 bytes
SHA-256: f826e52bd2a249f1f6872c38b8f15b74ebd98971f46d108a3cc05b120330d9e9
font_03_sfnt_off00014d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D61 16696 bytes
SHA-256: cdcba53a56585892c38fb67430683280f96d2caea9209f1577e3eb313775dc5a
font_04_sfnt_off000163e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163E3 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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