Malicious PDF — malware analysis report

Static analysis result for SHA-256 180a01a5b1ba595f…

MALICIOUS

PDF

65.7 KB Created: 2021-02-14 04:48:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b6cc5fc2fb62d21ed7194f14491d7c0a SHA-1: 56aba3d79a0bd6a23a0c370cfd927c0d774984c2 SHA-256: 180a01a5b1ba595fe66dd5f8ca9acaf534af18521d956eb3895aeec3f023d965
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, https://druttle.ru/wix?keyword=the+living+environment+review+book+answers, is presented as a lure to trick users into downloading a malicious PDF. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it may leverage embedded JavaScript or other PDF-specific exploits to deliver its payload.

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://druttle.ru/wix?keyword=the+living+environment+review+book+answers PDF link annotation
    • http://winoorama.website/ielts_answer_sheet_reading_academicp84xb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474759/normal_60152a9d26154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_601ac627539a4.pdfIn PDF document text
    • http://b4shop.icu/darken_before_printingmyvlh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401983/normal_5fcbdf997c591.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458407/normal_5ffdab984b821.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366633/normal_5feb15eaea5ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366317/normal_6000094befa17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484997/normal_5fc6752e9888d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://memaded.epizy.com/bizhub_c364e_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/free_english_reading_comprehension_worksheets_grade_6.pdfIn PDF document text
    • http://pobunutad.epizy.com/curriculum_development_models.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/belkin_n150_wireless_router_firmware.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/62539026731.pdfIn PDF document text
    • http://weferobiditikun.epizy.com/80943175407.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_off0000c46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46E 5404 bytes
SHA-256: c272f58a803a706084c7a31dc173ee7062d28528386a6b911d5d19955b8480e5
font_01_sfnt_off0000d6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B9 10200 bytes
SHA-256: a3aed366fefbf7bdd8e2cb1c2975f9cc9b3348eb43725e9c9010d441d5b18acc

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