Malicious PDF — malware analysis report

Static analysis result for SHA-256 f304d9dd64f12d27…

MALICIOUS

PDF

125.9 KB Created: 2021-04-08 01:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f32e7567730c310606a08f247b972ccf SHA-1: 05e65608e12bc615777dd8c19c53df8a4523bf5e SHA-256: f304d9dd64f12d2748d220ef9c0dc426f33abb40ca1fb3ad3d00ebfbf95c72b1
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to direct users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://vilenefex.ru/strik?utm_term=what+are+three+examples+of+rise+of+nationalism+in+africa PDF link annotation
    • https://cdn.sqhk.co/xawemubimaj/eIBifAM/tusumugadulomena.pdfIn PDF document text
    • http://fogukupututi.22web.org/murajiguzokemixexasok.pdfIn PDF document text
    • http://beliyden.xyz/66468404926qm717.pdfIn PDF document text
    • http://losqutoq.online/liftmaster_professional_formula_1_adjustmentsz990.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/ghaggdT/video_downloader_for_opera_browser_android.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/jgfAagj/kizevodufeve.pdfIn PDF document text
    • https://cdn.sqhk.co/murofoli/51pigie/xijodidixa.pdfIn PDF document text
    • http://pozonewexoz.iblogger.org/79639926179.pdfIn PDF document text
    • http://lirerigoteses.22web.org/how_do_you_set_the_sharp_atomic_clock_on_a_spc373.pdfIn PDF document text
    • http://wezozubiweriged.iblogger.org/zejorelukez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bcc300f-c9a3-40a3-94f8-b431d8fa9f4b/does_samsung_tab_s6_come_with_keyboard.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_f91f4dabae164c4497b9188822bbc514.pdf?index=trueIn PDF document text
    • http://luzeparuzibez.rf.gd/xemiwalukojigi.pdfIn PDF document text
    • http://dololesorut.epizy.com/upsc_cds_2_2019_question_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05404d0c-a419-4345-85a2-a2000c197795/vaxowujonoxadifazigabof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65439ba7-78e7-4f13-b7cb-95c2161fcf1a/48042308803.pdfIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_5bdc5e6b5ab24ad0b5a12c168681ec7f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/31271c36-1f03-4020-9157-1bc2c520d7a8/pokemon_adventures_manga_volume_1_download.pdfIn PDF document text
    • http://busapow.rf.gd/how_proust_can_change_your_life_amazon.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_off0001af75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF75 5336 bytes
SHA-256: dddf71343f15d4bc29401eca92f8365ad42c72aa382221989a96c759a3a9c94a
font_01_sfnt_off0001c184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C184 11564 bytes
SHA-256: 8b319859af9b4129636bc4fad1368a7d1b5e97ded284023b8d11fe335cc2f972

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