Malicious PDF — malware analysis report

Static analysis result for SHA-256 c792c7425bbeb699…

MALICIOUS

PDF

78.5 KB Created: 2021-02-07 02:49:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 86ac89c598aed340be49c6bfc0040fe7 SHA-1: caad3ddf7c687065217e1eff34be69b5fc4af3bf SHA-256: c792c7425bbeb699fe54d8d86e84dbd57075ca5feb45ff648bae26684e17a3d3
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The PDF_URI heuristic confirms the presence of an external URI, which is likely used to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=quit+claim+deed+minnesota+definition PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368492/normal_6006a3cc7e24e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452389/normal_5fc65d54b43cd.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/hfTijNt/vilaxefiripidisubeguna.pdfIn PDF document text
    • https://cdn.sqhk.co/tubadaluzafu/ib4b6e2/jiduzolodotapebikudu.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/mhbjchg/smart_and_final_fresno_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/0nTz8nf/74302533594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_5fd9e42ab4e90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465394/normal_5fe828e1354e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387562/normal_5fee46d18a2f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5fd085956e9cd.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
    • http://wirirarosutuki.epizy.com/42576317218.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/99978031517.pdfIn PDF document text
    • http://dusozizogotudim.epizy.com/xiaomi_eu_miui_10.pdfIn PDF document text
    • http://xorikija.epizy.com/university_of_calgary_campus_map.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/69695687315.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/fractions_word_problems_grade_5_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/manual_de_instalacion_alarma_avital_3100l.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/8663496879.pdfIn PDF document text
    • http://bijamujijupife.epizy.com/build_apk_from_react_native_project.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE926 5016 bytes
SHA-256: ec4a713680e25ce5d2ab8cc21441881e400c0f2a63e467b887e36d66bd5ed44d
font_01_sfnt_off0000fa20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA20 10676 bytes
SHA-256: 2f520a1da3311b57f58da559bace2575650f97a9b800517e334bca735f189b35
font_02_sfnt_off00011e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E74 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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