Malicious PDF — malware analysis report

Static analysis result for SHA-256 a88dc23c277872f2…

MALICIOUS

PDF

71.4 KB Created: 2021-02-09 02:45:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2855adbc422a810dbdba5a2091700667 SHA-1: ba196ae24c04db0d5e3d2ae6f1747292f74b748b SHA-256: a88dc23c277872f25cf6c2e4fcbd436686d4a2b812869a25c706bfcac60ba056
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to host malicious content or redirect the user. The document body, though heavily obfuscated, contains keywords related to the embedded URI, suggesting a phishing or social engineering lure.

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://seumenha.ru/wb?keyword=hydralazine%20davis%20plus%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415769/normal_5fe6c07810a31.pdfIn PDF document text
    • https://cdn.sqhk.co/fazituku/hcjdhcy/74462013444.pdfIn PDF document text
    • https://kibopomirisusi.weebly.com/uploads/1/3/2/7/132741064/wezofulotawe-wevajavumedilo-rapavaguvalem.pdfIn PDF document text
    • http://romomikas.22web.org/58750189152.pdfIn PDF document text
    • https://cdn.sqhk.co/tadeketoxab/Aiajbvp/acellus_academy_reviews_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/gUxzTje/shark_survival_craft.pdfIn PDF document text
    • https://cdn.sqhk.co/kanereneb/hohbjjy/masha_eo_urso_boneca.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/fajujiju/60566403656.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/99711516755.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/37621318668.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/52810741621.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/62513993524.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/hr_job_advertisement_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/base._pbp_file_for_psx2psp.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_off0000d4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C6 5208 bytes
SHA-256: 6eb9abefea08caf3f41f011710cb025530e8f0d90f37cc10f9a85f8dddaf20a7
font_01_sfnt_off0000e69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69E 12984 bytes
SHA-256: 13c0e8e9fb3cbdc0fa9dc63ba6d8c0024ad0c9157d71bbca061fd63ee5e6e082

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