Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc3c737ae5ebdba2…

MALICIOUS

PDF

88.0 KB Created: 2021-03-03 19:58:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a9f0c1610d61271abaa77ae11c8b7cf5 SHA-1: dc78866fe0799200759fc3edf46fd6cb5b56aedb SHA-256: dc3c737ae5ebdba2c06c84ac89a06b473950cae85f4281fca51479dab4a158cc
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to 'beginner piano songs sheet music'. The presence of external URIs and the overall detection by security tools indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=beginner+piano+songs+sheet+music PDF link annotation
    • https://cdn.sqhk.co/duxadikoti/hchciro/bubble_gum_simulator_codes_for_legendary_pets_2019.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/e21f698ca.pdfIn PDF document text
    • http://tupilofegogevas.22web.org/list_of_kagan_structures.pdfIn PDF document text
    • http://indonesia2health.online/678799447290ditr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372373/normal_60059041bfffb.pdfIn PDF document text
    • https://xiliperudal.weebly.com/uploads/1/3/3/9/133999468/kubop.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/sJWgi83/xitibaguf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_60281228d1976.pdfIn PDF document text
    • https://jetezoxow.weebly.com/uploads/1/3/1/3/131379231/5311929.pdfIn PDF document text
    • https://tofudilasikota.weebly.com/uploads/1/3/0/9/130969343/xifezoniba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xawabaxazulaga.epizy.com/gidavejuluvod.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/64215476038.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/61720731626.pdfIn PDF document text
    • http://xetonuvabogo.rf.gd/sawuxujagakovika.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/save_the_date_email_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/rush_tom_sawyer_album_cover.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10517 5364 bytes
SHA-256: f6fee75d9598e1449de2bbae65957af984b47938b8b8b43ccc630e09ff62b897
font_01_sfnt_off00011732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11732 11180 bytes
SHA-256: d1dd0d41f893b9429d44eb05f3a038802c5425d8db0b421188158e9ee1f3ea45
font_02_sfnt_off00013d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D6C 16100 bytes
SHA-256: d973db94ba2c448c661c26f08d051ac794e7cb4f3c7daa33c2141e8036f071b6

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