Malicious PDF — malware analysis report

Static analysis result for SHA-256 589e20b1ecebf632…

MALICIOUS

PDF

199.1 KB Created: 2021-03-27 11:36:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 196f69385f0e781d40e74d80312368c3 SHA-1: 22b7a89311a126885e9af1739d6b54e56f9a950d SHA-256: 589e20b1ecebf63229a5ab3d23fb8fb7db3ac96ed02686b03809ebd57108c226
136 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a phishing site, as indicated by the 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristic. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The primary IOC is the malicious redirector URL, which is likely used to lure victims into providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://mezovuduw.ru/wix?keyword=google+voice+%25E7%2594%25B3%25E8%25AF%25B7%25E5%25BE%25AE%25E4%25BF%25A1 PDF link annotation
    • https://bamegipizof.weebly.com/uploads/1/3/4/6/134647446/banupovilepizonif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446490/normal_6044fc3718f6b.pdfIn PDF document text
    • https://fikobovivinuzo.weebly.com/uploads/1/3/0/7/130739062/3259494.pdfIn PDF document text
    • https://tifuvanolini.weebly.com/uploads/1/3/4/7/134703883/nexizafemagegam-jokalerarilu.pdfIn PDF document text
    • https://fowaloxew.weebly.com/uploads/1/3/4/8/134881160/ec6357ead0b58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410206/normal_602b10afedee6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/didowugorokirug/ibanez_gsr200sm_gio_bass_natural_grey_burst.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/lanujasubikigog.pdfIn PDF document text
    • http://gawuvuv.epizy.com/87138377186.pdfIn PDF document text
    • http://renodiwug.epizy.com/single_and_double_displacement_reactions_worksheet_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4983f1-00ec-477f-8a62-6b966199aaaa/wunofaxomonekak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce7b83eb-d48f-4077-8f23-1630da003cd4/how_to_reset_check_engine_light_nissan_sentra.pdfIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_1464fa06b4364120b89b2c8fb2cefe6a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zasepo/action_ou_vrit_pro_apk.pdfIn PDF document text
    • http://razebegapusej.rf.gd/38046653602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b50314fe-2f1f-4100-acef-47d33695b24b/yamaha_01v96i_usb_midi_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d4fadea-b61a-4004-9230-21ad2dc1c923/kenmore_front_load_washer_manual_drain.pdfIn PDF document text
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_3540d097454e4e749ec424450433c450.pdf?index=trueIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EB 159064 bytes
SHA-256: f940af4b2d6b59f05e7f92ee2a79cf76ff1ad08204be44f7f482dee0029a5cea
font_01_sfnt_off0002bd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BD3B 3892 bytes
SHA-256: f0bedda8e3147e7d5956a7516c3b01160fa54a2c98fd598cbb114f5a8f5cac8d
font_02_sfnt_off0002cacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CACF 4176 bytes
SHA-256: 067f65e119ca1c3e90b94df2ef397f15c665126dc1a0a60de9ad92d1d31fbfa3
font_03_sfnt_off0002d909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D909 10844 bytes
SHA-256: bb0cd9db7d5fc89a4d0ad76bd0101284472ff4dd2aef6e43c20402536a55194b
font_04_sfnt_off0002fe05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE05 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333