Malicious PDF — malware analysis report

Static analysis result for SHA-256 428389d485c995b5…

MALICIOUS

PDF

91.6 KB Created: 2021-01-23 21:12:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3a6650c0384c8ae9769359a30c8b1192 SHA-1: b430b3e65379187e99390f5f89f9f32217cfeb0d SHA-256: 428389d485c995b5ecb3bc64b89e47cb30cc14cecca59878ec48de1532b74f07
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically linked to a 'david tanaka vitiligo' search term, suggesting a phishing or scam lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious nature by indicating the PDF is part of a link farm on disposable hosting, designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffnew.ru/123?utm_term=david+tanaka+vitiligo PDF link annotation
    • https://site-1173140.mozfiles.com/files/1173140/screen_recorder_windows_with_audio.pdfIn PDF document text
    • https://site-1176776.mozfiles.com/files/1176776/sipugu.pdfIn PDF document text
    • https://site-1249763.mozfiles.com/files/1249763/backstab_game_apk_mod.pdfIn PDF document text
    • https://site-1173985.mozfiles.com/files/1173985/xusugidevadixefine.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/upxiche/29939702483.pdfIn PDF document text
    • https://popajilosofov.weebly.com/uploads/1/3/0/7/130776408/1374236.pdfIn PDF document text
    • https://cdn.sqhk.co/jexerigix/hccSvie/non_flying_birds_images_with_names.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/1051455.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/djeqhaL/89713591502.pdfIn PDF document text
    • https://site-1174218.mozfiles.com/files/1174218/tor_browser_android_screenshot.pdfIn PDF document text
    • https://nivikaxixigimom.weebly.com/uploads/1/3/5/3/135322477/musajafox.pdfIn PDF document text
    • https://site-1175829.mozfiles.com/files/1175829/rangers_of_oblivion_na_pc.pdfIn PDF document text
    • https://devaropig.weebly.com/uploads/1/3/4/6/134616199/mewugiwiduxix_wevolagopugoba_xujaxolanofi.pdfIn PDF document text
    • https://site-1177895.mozfiles.com/files/1177895/best_cheat_engine_for_android_no_root.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xodupope.epizy.com/graphing_cartesian_plane_worksheet.pdfIn PDF document text
    • http://femasusatatovet.epizy.com/kick_the_buddy_game_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/dcms_5g_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/fracture_cuneiforme_medial_pied.pdfIn PDF document text
    • http://dawutanarav.epizy.com/91197207639.pdfIn PDF document text
    • http://terefikug.epizy.com/reference_cheat_sheet_example.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE585 22140 bytes
SHA-256: 4b526fd7ae7e9a7a9c37128c00841e732295eadf42948db31b9289b0f7296708
font_01_sfnt_off00012b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B04 4844 bytes
SHA-256: 6ca5454bade913eb4874a2426f313ff2d07e40640089a3d877c8ff37ff9145f4
font_02_sfnt_off00013ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA5 10632 bytes
SHA-256: 50e65f39065d9b98f0e5c42c3fafd09ad6f3207c445d638602f87af2d4ff76ab

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