Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ac30036f4320bad…

MALICIOUS

PDF

85.3 KB Created: 2021-03-04 00:48:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 0611b32912ecbe5de05859109f7a0f91 SHA-1: c544ebecaf91f7dc26716a50425e6c76cc04c71e SHA-256: 4ac30036f4320bade4530237c535768bd4fa29052f496c0504b38ce4c611bf90
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism to deliver malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'Cricut Expression' and includes metadata from wkhtmltopdf, indicating it was likely generated to appear as a legitimate search result or informational page to trick users into visiting the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=can+i+still+use+my+cricut+expression PDF link annotation
    • http://ufenmac.com/soils_and_foundationsbyflp.pdfIn PDF document text
    • http://demask.space/383920584708wg3h.pdfIn PDF document text
    • http://pubggaming.online/xikebumogsa8p.pdfIn PDF document text
    • https://cdn.sqhk.co/jategumeb/f7hfNjg/59155677356.pdfIn PDF document text
    • http://fc-aromat.ru/234678549064mae5.pdfIn PDF document text
    • http://homearfes.com/42597632560omvq3.pdfIn PDF document text
    • http://dimax-matrasy.ru/kukedabaju02ye4.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/6hcgdib/bisibuluwukejikavuwimeso.pdfIn PDF document text
    • http://cardioactiveitalia.site/5092162088dbslc.pdfIn PDF document text
    • http://photoforce.ru/lenagijepumb5kg5.pdfIn PDF document text
    • http://thedouche.xyz/practice_worksheet_graphing_quadratic_functions_answer_keyc2p2a.pdfIn PDF document text
    • http://taxukubuxiwor.iblogger.org/kenmore_elite_smartwash_quiet_pak_9_error_code_f11.pdfIn PDF document text
    • https://cdn.sqhk.co/xovatagemi/MghidTo/download_tug_table_mod_apk_android_1.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
    • http://goviragukipi.epizy.com/calculus_by_earl_w_swokowski_6th_edition_free_download.pdfIn PDF document text
    • http://xidijunuv.rf.gd/32108741269.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/why_is_my_ryobi_battery_flashing_green.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/vorasoxinexezojolezuf.pdfIn PDF document text
    • http://xobebol.onlinewebshop.net/35757245808.pdfIn PDF document text
    • http://pitolujebenim.epizy.com/87438822641.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE8 5156 bytes
SHA-256: 7735a1385792d857259106b6527e46acfa11e8b1c6323f123528d8da9b330de0
font_01_sfnt_off00010e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5A 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000116e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E7 10148 bytes
SHA-256: ea3b4454e01f21f3aa0c37074c2d496b09b7ef7b4983c6cd2022f867a928202d
font_03_sfnt_off000139a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139A2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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