Malicious PDF — malware analysis report

Static analysis result for SHA-256 b980acddb5629976…

MALICIOUS

PDF

71.5 KB Created: 2021-02-19 17:01:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: a427d5556733e2df7a7a5f4495e66d24 SHA-1: d7bab018fa2497e12dddd9eb3e110fcbc484d878 SHA-256: b980acddb56299763dc1c7c9d7a9943f9dfb8dda1011be825e1d1ac0cc2b47a4
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that redirects to a suspicious domain, likely serving as a lure for phishing or malware distribution. The document body, though partially corrupted, suggests a social engineering pretext related to a book summary.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=dr+seuss+horton+hears+a+who+book+summary PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484376/normal_60076e3e30ba6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5fd66e2f7ea5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464078/normal_5fdf7896c036d.pdfIn PDF document text
    • https://cdn.sqhk.co/xudapurofoz/igehdig/xadadobomibepivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413457/normal_601f80505850f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383797/normal_5fdf95858cf4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458161/normal_5fd6620d679be.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/hgKYYEr/dictionary_app_free_download_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369163/normal_5ff7c65d2c0c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385635/normal_600a1b5acec42.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/Aijjgib/71373167511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415946/normal_600adc2077646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444351/normal_602d61460c9a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405945/normal_5fca4dbd272ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381980/normal_5fcfade0ec859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426697/normal_5fd92b42b5b7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415768/normal_5ff2e2a1d4ac5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425723/normal_601577662ca61.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/juvetaso/risedronate_davis.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/demonstrative_pronouns_worksheet_for_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/discounted_cash_flow_template.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_off0000d88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88A 5288 bytes
SHA-256: 64ffa8870e4eabd0bd703e7c99277ed27195eda4e3683b9e8bda4873b82e06c0
font_01_sfnt_off0000ea77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA77 10700 bytes
SHA-256: e9ea1526abcf4c9b1402ef24b570838551ba01a8408755090eca266fbf303fb6

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