Malicious PDF — malware analysis report

Static analysis result for SHA-256 382cac9ba4f0ff75…

MALICIOUS

PDF

78.8 KB Created: 2021-03-30 15:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8c0c70d30b65b715e18d0273c3761ecf SHA-1: a72e35cf943f988b1f6a2def66127756061dc1db SHA-256: 382cac9ba4f0ff7508d06fcd68d91eadf014bafb68b3eeac6a2367fcbfba5b80
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to 'amigurumi patterns free pdf' and is associated with an external URI pointing to a similar keyword, suggesting a phishing or social engineering lure. The presence of embedded URLs further supports the attack pattern of delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/award?keyword=amigurumi+patterns+free+pdf PDF link annotation
    • http://interstart.online/teach_yourself_to_think_free_downloadnza55.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://nikecortez.net/who_is_prince_eric_in_the_little_mermaid_remakeeuuee.pdfIn PDF document text
    • http://tosufiloxosi.66ghz.com/ledipalonogovafem.pdfIn PDF document text
    • http://tertov.xyz/why_am_i_dreaming_about_vampires0xxa5.pdfIn PDF document text
    • http://sochi2026.com/40646741097uifhi.pdfIn PDF document text
    • http://ttop-shop.com/9337270829upxjr.pdfIn PDF document text
    • http://damvglaz1.xyz/leetcode_pythonpp9u2.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/lorifumofelu/sigijebo.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/28415093528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bdc1cb4-7e9d-441f-b900-58397b9d85d6/vesimekulised.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/nujijufapoxixarod.pdfIn PDF document text
    • http://kosevozi.rf.gd/methods_of_apportionment_of_joint_costs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6e3d420-c543-4eff-b8a8-d91862c22101/17217892930.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/lexis_audio_editor_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/boseximimuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12145bef-e33c-45cf-af9c-101fecb97e34/netgear_prosafe_xs708t_review.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/xoruwejovuvotamorolu.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/45246830805.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/nejikowexo.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_off0000f658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF658 5320 bytes
SHA-256: 7e91a08ca633055d3e310c9da88e24c2462b15b69e46589ab5264df52c9db07d
font_01_sfnt_off0001085b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085B 11028 bytes
SHA-256: a65b1f595b162a83bfb7c66d0b0095f45da7115c32cd6c926427445deb02f120

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