Malicious PDF — malware analysis report

Static analysis result for SHA-256 1930523be3f06696…

MALICIOUS

PDF

71.8 KB Created: 2021-02-06 13:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 676068ee516f5f500db021b2e3d73ccd SHA-1: dff1bd6eee1b619044b03cae81c2bde5c2d5e1b8 SHA-256: 1930523be3f06696b0492e631c75ca41ea635e1d8460cc6d2a8d9e7e2c3c25d2
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a malicious site. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or redirection attack, likely using a malicious PDF to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://yafferge.ru/wb?keyword=coding%20guidelines%20for%20anemia%20in%20ckd In PDF document text
    • https://cdn.sqhk.co/retepisej/ia3Khgb/rolujusujulefalamivem.pdfIn PDF document text
    • http://valamivu.22web.org/83038836697.pdfIn PDF document text
    • https://cdn.sqhk.co/wokowuvawuz/NdgeOhb/tixax.pdfIn PDF document text
    • http://buytoday.cc/rise_up_lyrics_andra_day_youtubeh7q4b.pdfIn PDF document text
    • http://usblighter24.site/desivo3jyvj.pdfIn PDF document text
    • http://limons.space/financial_statement_version_report_in_sap_tcodepirjf.pdfIn PDF document text
    • http://promoocaoameericanas.com/anthony_robbins_livros_downloadr30tm.pdfIn PDF document text
    • https://cdn.sqhk.co/xesofosirija/ajfgjhd/sumutadap.pdfIn PDF document text
    • http://ita-talia.fun/heir_of_love_choose_your_story_mod_apkyv22k.pdfIn PDF document text
    • http://tryraisins.club/afro_asian_literature_download5gn2i.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/vososasoxumete/traducir_archivo_en_ingles_a_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/notepad_6._9.pdfIn PDF document text
    • http://zoregok.rf.gd/91886471093.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/movies_telugu_hd_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/free_ayatul_kursi_with_urdu_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/gudazologabajamixeki.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_off0000dbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB9 5308 bytes
SHA-256: bab57983ec38096eedba948f9030a02bab899207bc5dc9d714dbc15da6215795
font_01_sfnt_off0000edb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB5 10884 bytes
SHA-256: a532bcf4139dce6fa8412129bf9d3de79d42da03d5ac26f500f20ea4feee8eb1

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