Malicious PDF — malware analysis report

Static analysis result for SHA-256 189bfa3b6b09c309…

MALICIOUS

PDF

117.4 KB Created: 2021-02-18 22:06:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4b295306ca38e00d557bca22c79c565c SHA-1: 71732e2c0eb753f2ea490fbdfe5fc7409a1a903b SHA-256: 189bfa3b6b09c309bdbd787b81e763c19d6056a7b300f2a711beecb3a68414af
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=what+is+ibn+in+arabic PDF link annotation
    • http://amorexpo.com/running_warehouse_customer_service280zo.pdfIn PDF document text
    • http://dkshlyap.ru/the_students_guide_to_cognitive_neuroscience_4th_edition27zrp.pdfIn PDF document text
    • http://car-test.pro/81121752689z1qx.pdfIn PDF document text
    • http://bobr.space/43544378282op7xk.pdfIn PDF document text
    • http://topsalon.xyz/melusituzozagetafunuzojtriz3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://venavabumekaj.epizy.com/74253364341.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/billa_billi_akh_punjabi_song.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/capital_gains_tax_nz_working_group_report.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/merger_arbitrage_fund_performance.pdfIn PDF document text
    • http://zekakodususebu.epizy.com/51190206660.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/orange_county_school_calendar_2017-_18.pdfIn PDF document text
    • http://zimunumiwu.epizy.com/63184966055.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/tusoxuvozipori.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/symphony_no_5_beethoven_sheet_music.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000183e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x183E4 28620 bytes
SHA-256: 17c7e0822b891cf05e9f8d7f620893cc3096cb3ade2fda70bece8142a83d08b2
font_00_sfnt_off00012861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12861 5008 bytes
SHA-256: 68efa7f38448ec69250bb2dd0a608f188f215c658ab6d3aa2a09dae533b4f06f
font_01_sfnt_off00013971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13971 28852 bytes
SHA-256: 0ad94076f67c0906f964f1e2a5b9f778757b4980ab95d79a398af7fa3f184d79
font_03_sfnt_off0001b79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B79D 6472 bytes
SHA-256: abe14282bcedac8d0ebd6b4b6f7135d36d5227c7ea54f0585ee6bef1399be5ba

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