Malicious PDF — malware analysis report

Static analysis result for SHA-256 003f422f369ab597…

MALICIOUS

PDF

68.0 KB Created: 2021-03-04 16:12:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 0466f54414b25192ba13bf133e3454df SHA-1: d4193869ea7e3eb924d69db586a989e9ce38a277 SHA-256: 003f422f369ab5972ed8eb58d898b958f93a1b0a67f6505fec45e14a98fea1f8
184 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links, with at least one identified as a redirector to known malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, which can be used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=the+vegan+diet+for+weight+loss In PDF document text
    • https://kogusixotitijib.weebly.com/uploads/1/3/4/6/134692341/3061893.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/89981379525w2f92.pdfIn PDF document text
    • http://covidcapsule.world/fosuxozumivugazifegetiwu1k5lp.pdfIn PDF document text
    • https://lugejalafomap.weebly.com/uploads/1/3/4/8/134884490/letesobepomapej.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/hdQjgxH/99584241928.pdfIn PDF document text
    • http://tufejife.22web.org/african_history_a_very_short_introduction.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/lrhbahf/escudo_club_america_dream_league_soccer.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/3HjaidL/mobile_passport_control.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/fuganakurejuketud.pdfIn PDF document text
    • https://cdn.sqhk.co/naxibibu/cjghehg/free_online_reading_comprehension_for_kindergarten.pdfIn PDF document text
    • http://xekugesakurupab.22web.org/melurosenijuk.pdfIn PDF document text
    • http://trelon.fun/forklift_daily_checklistm5zm5.pdfIn PDF document text
    • http://fisuruwibowin.66ghz.com/guided_drawing_lesson_plans.pdfIn PDF document text
    • http://zatoxuvisovapuf.sportsontheweb.net/matotelutedogekawofa.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/Sria6t0/15763333945.pdfIn PDF document text
    • http://navalny.design/3677285925579w1f.pdfIn PDF document text
    • https://kemebawe.weebly.com/uploads/1/3/5/3/135313751/d4ebab19e6dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gevewodex.epizy.com/14910752845.pdfIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/jesoriv.pdfIn PDF document text
    • http://fuvituze.epizy.com/assassin_s_creed_game_for_android_mobile.pdfIn PDF document text
    • http://sudurima.rf.gd/36365831597.pdfIn PDF document text
    • http://lerapavuzuloz.epizy.com/90255711775.pdfIn PDF document text
    • http://jodaniti.epizy.com/eva_luna_novela_capitulo_15.pdfIn PDF document text
    • http://kokegewabero.rf.gd/how_do_you_use_dymo_labelwriter_450_on_mac.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD59 5272 bytes
SHA-256: 53dfa7f7ac9d7d18ecda302e8e1fd5e5b8b2e4b8aa2ae0084676c3d0aac4b8c0
font_01_sfnt_off0000df58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF58 10300 bytes
SHA-256: 2d21e729bfc72d439c37ec3b62f0598ea161711f8cbf7e6508f197762d05ee3f

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