Malicious PDF — malware analysis report

Static analysis result for SHA-256 be392886e7edd102…

MALICIOUS

PDF

78.1 KB Created: 2021-03-27 09:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4acce4acef230b97eec66db89e4da09e SHA-1: 3c2980c2122bfd2ceacbe43015a527d47da45772 SHA-256: be392886e7edd1028e6c29e28e240e3fb5bb682264fc7894565baa33cd951f2a
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=video+helper+companion+app+not+working PDF link annotation
    • https://bosesabefo.weebly.com/uploads/1/3/4/3/134362720/2726693.pdfIn PDF document text
    • http://gavixefelij.iblogger.org/chalkboard_menu_template_psd.pdfIn PDF document text
    • https://cdn.sqhk.co/sufokorume/gcYjebz/28769479018.pdfIn PDF document text
    • http://nebofimanigi.sportsontheweb.net/95415688644.pdfIn PDF document text
    • https://cdn.sqhk.co/fomolunuvufa/hgdghhc/moto_g3_front_camera_not_working.pdfIn PDF document text
    • https://manatelagaren.weebly.com/uploads/1/3/1/4/131437493/6307812.pdfIn PDF document text
    • http://tilikef.mygamesonline.org/promissory_note_california.pdfIn PDF document text
    • http://hallop.xyz/garmin_2699_sd_cardwdx7d.pdfIn PDF document text
    • http://maxist.ru/2013_dodge_charger_sxt_plus_awd34x6b.pdfIn PDF document text
    • https://cdn.sqhk.co/zedujunuwuxe/ggjjfvu/crystal_reports_runtime_10._5_x64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/sipulipenusodut.pdfIn PDF document text
    • http://rawuvotatu.rf.gd/european_guideline_variation.pdfIn PDF document text
    • http://totuxivez.onlinewebshop.net/does_roomba_960_have_smart_mapping.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/79495183810.pdfIn PDF document text
    • http://sewemira.atwebpages.com/beef_pilau_recipe.pdfIn PDF document text
    • http://wumafopid.onlinewebshop.net/46697761870.pdfIn PDF document text
    • http://mojamolo.rf.gd/open_in_new_browser_window_c.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_off0000f20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20C 5428 bytes
SHA-256: 486c002fcb1b39fb07942ad17013d5137fdf05ac7dbf047b647d2f745270ebf4
font_01_sfnt_off0001046d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046D 10780 bytes
SHA-256: ae15df6adf0620b2b4579705cec946583c201d0d5b28882671d3ef3fba5de539

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