Malicious PDF — malware analysis report

Static analysis result for SHA-256 68fbeeb7fd924cf1…

MALICIOUS

PDF

76.7 KB Created: 2021-02-15 17:03:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 35ae894b0ed5eb1f4e4c92038ddc12db SHA-1: af2092781216f94b41698fa727a13d7d87f5244d SHA-256: 68fbeeb7fd924cf11f376075bf540381cd96a03026e6432f3640abd4178f607d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'https://crophysi.ru/123?utm_term=what+was+the+impact+of+the+affordable+care+act', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to the Affordable Care Act.

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://crophysi.ru/123?utm_term=what+was+the+impact+of+the+affordable+care+act PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460247/normal_5fe23d758089a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444356/normal_600b0a3bc29f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468540/normal_600a4e9f7f72c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391611/normal_5fda478f91cc9.pdfIn PDF document text
    • http://thehensleys.org/athletics_baseball_live_scores_stats_games_20203ivm4.pdfIn PDF document text
    • https://lamuwopinu.weebly.com/uploads/1/3/4/6/134632291/4cf5487896fd47d.pdfIn PDF document text
    • http://lalashoppen.online/28637766401163dh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389352/normal_5fefc92f7a5af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499635/normal_5fe5113033565.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460950/normal_5fde328e9d97b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://damoserik.epizy.com/22633961560.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/design_engineering_report_gtu.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/cognos_report_studio_date_prompt_format.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/molasebikezedo.pdfIn PDF document text
    • http://lisunamubeso.epizy.com/calculating_net_force_worksheet_6th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/homemade_bumblebee_transformer_costume.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/31844632291.pdfIn PDF document text
    • http://figejadinopi.rf.gd/does_dividend_affect_balance_sheet.pdfIn PDF document text
    • http://wutowaxodod.epizy.com/xalojejozili.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_off0000ebdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDC 5640 bytes
SHA-256: 410b3f9ebffd4b8d108c561f1169c0513087bf94c14894d85adda08c862649bb
font_01_sfnt_off0000fef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF3 11408 bytes
SHA-256: 549bf878500dca78864668732807fc3e254b6e52fd15b5aa188b3b49aafc3c5b

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