Malicious PDF — malware analysis report

Static analysis result for SHA-256 74498189e2e855aa…

MALICIOUS

PDF

72.4 KB Created: 2021-02-06 08:36:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 6d36cfea08bd898bcda9fac47209b819 SHA-1: 7dc3d2a20bac994154ced18fb31a81bc11ee145a SHA-256: 74498189e2e855aa011dadd1903daa3969565e0941e347b4c7ec12bf30548fa8
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it might be a crafted lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://jacksth.ru/aws?utm_term=aagadu+3gp+video+songs+free PDF link annotation
    • http://sport-stavki.fun/dixubasotobiseg5ndar.pdfIn PDF document text
    • https://vefamomapebimid.weebly.com/uploads/1/3/1/4/131406391/ff7c8094b9b88.pdfIn PDF document text
    • https://lezekuzog.weebly.com/uploads/1/3/1/3/131378913/tetepexo-zalotodu-bakoje-kotamedo.pdfIn PDF document text
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/949f27ed2b31387.pdfIn PDF document text
    • http://smeshnoykir.space/Desi_clips_gratisay4i9.pdfIn PDF document text
    • https://roguraluvi.weebly.com/uploads/1/3/0/7/130776180/mozokowavezuzedux.pdfIn PDF document text
    • http://japadalifu.22web.org/zaxodepamofakakelelegi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410674/normal_5fd234afdabd7.pdfIn PDF document text
    • https://dapalirodo.weebly.com/uploads/1/3/1/4/131483520/e69e3bedd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492897/normal_5fe4323f28a8d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fipijife/anonymous_chat_rooms_app_apk.pdfIn PDF document text
    • http://tanikotik.epizy.com/3224000511.pdfIn PDF document text
    • http://govujetimavex.epizy.com/chloroplast_structure_and_function_coloring_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/9852816057.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/bromothymol_blue_indicator_safety_data_sheet.pdfIn PDF document text
    • http://xokifenutotumu.epizy.com/wuzidiwezenarotigajazu.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/46045596548.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_off0000dc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC54 5388 bytes
SHA-256: 47951c62e5c341281200c46d860d3c17b25eb176fd97d66c902e02fbc414f4d0
font_01_sfnt_off0000eec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC7 11308 bytes
SHA-256: e82cb4b3c1367d818076af4dc0c120cf728118ea465f7ad4abfefa53af5a39fc

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