Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff1db9129e04b08…

MALICIOUS

PDF

150.9 KB Created: 2021-03-02 07:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 01d52075b3ad17f23d8d383225be917c SHA-1: 5d62157b8461aeb1b98c8035f64a9fddad588ab8 SHA-256: 5ff1db9129e04b08ac77d7d8238f205852a6a42b41d12463bf1e82653fad6e99
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/aws?utm_term=tabla+periodica+grupo+periodo+bloque PDF link annotation
    • http://dusalawolut.iblogger.org/8370710449.pdfIn PDF document text
    • http://togurebuk.66ghz.com/81622806391.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/20645498037.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nakeviw.myartsonline.com/why_wont_my_minn_kota_ulterra_deploy.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/xejip.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/comparing_fractions_worksheet_grade_3.pdfIn PDF document text
    • http://jabenesejamuji.rf.gd/29071427071.pdfIn PDF document text
    • http://serobamemesazan.rf.gd/what_should_i_do_first_in_red_dead_redemption_2.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/meeting_schedule_template_email.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/xanumazupuvela.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/zuzopujipaneru.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/93556207376.pdfIn PDF document text
    • http://siwomiwededu.epizy.com/pijezulurukeror.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0001f8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F8F6 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off000208ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x208EA 5276 bytes
SHA-256: b612558947342a06191d57fe2213e85007b7e83138f905c5e84d034e268b59df
font_02_sfnt_off00021ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21AD8 16060 bytes
SHA-256: b5d6939bc67b603e2e5557d6933c40ea015a7da8772427e598a371968907f259

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