Malicious PDF — malware analysis report

Static analysis result for SHA-256 110e63f047ffae36…

MALICIOUS

PDF

72.6 KB Created: 2021-01-24 00:39:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 9aad087ab1f63970c62a8699b42818b1 SHA-1: c38371a601eb0ef60fffb23ab425ac3bb5ce0b6c SHA-256: 110e63f047ffae36f3019f80a5243c8dfd4149868aa13a4af02e02dcf796f0bf
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure for downloading an "apk hack". While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest a phishing or malware distribution attempt.

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://leonvi.ru/123?utm_term=boo+apk+hack PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366980/normal_5ffbd31cf25e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501360/normal_5fe14224cae3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_5fd7c8737a505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377100/normal_5fee403ae134d.pdfIn PDF document text
    • https://site-1253089.mozfiles.com/files/1253089/analytical_geometry_of_three_dimensions_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366340/normal_5ffcc28367dba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491451/normal_5ffc1bcae7d99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476446/normal_5ff8dbd71e7f8.pdfIn PDF document text
    • https://site-1167961.mozfiles.com/files/1167961/97207734607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_600b70f81e403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476936/normal_6009ea3583fdb.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/nuxepiduded/cisco_webex_add_on_windows_7.pdfIn PDF document text
    • http://nipimixo.epizy.com/tudukadawugom.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/sodixipetabipadejoki.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/wedding_budget_template_excel_2007.pdfIn PDF document text
    • http://gifimedirawi.epizy.com/solidworks_bicycle_design.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/characteristics_of_living_things_worksheet_grade_1.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_off0000d6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E5 4828 bytes
SHA-256: dc620a89a8b0a96cd791d9fb1bf82c915c41883e750ae695e7dff3cf81d69f8d
font_01_sfnt_off0000e74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74C 1716 bytes
SHA-256: 7314a8110a688275e79cb4cd5cd058a9f858becaa7f01fde0a687197ddc85302
font_02_sfnt_off0000efd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD7 10816 bytes
SHA-256: 1b7da4e9145998c6f83db1f982c58cb0f6bf9d0838852cc48d85bb0ffb533465

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