Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9997c64c5fdd7d5…

MALICIOUS

PDF

78.2 KB Created: 2020-12-30 23:09:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2a4c56aa44eb763cb3c996cbc40bccae SHA-1: db111b09530aaecfcbf74dc34fa143e0950413ce SHA-256: d9997c64c5fdd7d518afe7262c7cb14222a36a8f7928dc4e4e6a36e799aa2358
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. The embedded URL and document body suggest a phishing lure, attempting to trick users into downloading content under the guise of free comics. While no scripts were directly extracted, the PDF structure and external URL indicate a potential for further malicious activity, such as downloading a second-stage payload.

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://trafficel.ru/123?utm_term=captain+underpants+comics+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414868/normal_5fa6172933f6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460983/normal_5fc8de8072dcd.pdfIn PDF document text
    • https://nixawajumumija.weebly.com/uploads/1/3/4/3/134338940/921200.pdfIn PDF document text
    • https://wozujetibudod.weebly.com/uploads/1/3/2/6/132682293/gapon-vuned-fijaxexo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444353/normal_5feb9d672487e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497650/normal_5fd27a32e7e12.pdfIn PDF document text
    • https://ninijaliwejito.weebly.com/uploads/1/3/4/3/134350726/26b2e35a80a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384632/normal_5f9552d008132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406229/normal_5fbdf72107c4a.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/LgeeSDP/light_purple_tie_dye_background.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454281/normal_5fd87725c48b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389354/normal_5f95c0578d4f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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_off0000e61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61F 5296 bytes
SHA-256: 1768ced47395fc94d5f35b326abbfb1f72d2a0993329202fbc44b9be0ef6345c
font_01_sfnt_off0000f81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81C 11000 bytes
SHA-256: 9327aa2d9b62e3d626ec83748eede07320ed74b1e6645d02161f680ba60a9cae
font_02_sfnt_off00011db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB6 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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