Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8dbf6059ebb34be…

MALICIOUS

PDF

63.1 KB Created: 2021-02-11 23:32:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d818894ef22b9e23b85f70c5af44783 SHA-1: d50ab62ee7853aa73cc2230ee0303111637ea48b SHA-256: f8dbf6059ebb34be617f0a2c09e973aba9556783446c78d8dd4247489101f8ab
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a search result for educational content, likely to trick users into clicking it. ClamAV and ML classifiers have identified this file as malicious, specifically a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

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://crophysi.ru/123?utm_term=geometry+module+2+lesson+2+answers
    • https://koralazuvumo.weebly.com/uploads/1/3/1/8/131871516/1992925.pdf
    • https://zadavutuni.weebly.com/uploads/1/3/4/3/134343582/kevotebugi-bixog-nifigitovedu.pdf
    • https://sesupukaxupasi.weebly.com/uploads/1/3/1/0/131070911/6111ac3648393a.pdf
    • https://palotuzumi.weebly.com/uploads/1/3/5/9/135991270/731520.pdf
    • https://lobogisotu.weebly.com/uploads/1/3/4/8/134870795/joruma_banubun_bodudas_topime.pdf
    • https://nitesefoxon.weebly.com/uploads/1/3/1/4/131453907/kafozep.pdf
    • https://fuxiwajusefu.weebly.com/uploads/1/3/4/6/134617271/ce89e6bf65.pdf
    • https://cdn.sqhk.co/ranotigu/crH8Tge/sonnys_menu_belle_vernon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bamepofewalada/wow_herbalism_bfa_guide.pdf
    • https://s3.amazonaws.com/medaliwifufugel/let_s_learn_english_book_2.pdf
    • https://s3.amazonaws.com/meludav/bescom_bill_payment_receipt.pdf
    • https://s3.amazonaws.com/bezegoluzose/extent_report_with_testng_listener.pdf
    • https://s3.amazonaws.com/jixeremipet/homebrew_race_template_5e.pdf
    • https://s3.amazonaws.com/daxemo/numimumiforoxu.pdf
    • https://s3.amazonaws.com/resisuna/92396977576.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6e7.bin
edc6cb5a9953922750b4887948a53db98baafc5d6eec1dc484ee20ea39fc68d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6E7 5328 bytes
font_01_sfnt_off0000c906.bin
78a1b920c569b963073f90186ed74fe2a42e9d22810ec1db29b9a9ce240438c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC906 10776 bytes

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