Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf6b009917cfaf8…

MALICIOUS

PDF

85.1 KB Created: 2021-05-18 04:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e07077096d70853f2b66b1c8c5236661 SHA-1: 9697c24964e63b7328d135e200b0691b3c2348d4 SHA-256: 9bf6b009917cfaf81349dab1966f1794786fdf8cb20e54b2e4a25f6c669d085d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=art+project+proposal+example+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4493597/normal_5fde81ce5bc1e.pdfIn PDF document text
    • http://xolidila.iblogger.org/37781554866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475874/normal_6016b69f6b939.pdfIn PDF document text
    • http://figojusu.iblogger.org/african_drum_music_for_beginners.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476453/normal_6046c5f9e58b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412170/normal_5feb076a56660.pdfIn PDF document text
    • http://suniwenejuwodel.iblogger.org/convert_webpage_to_chrome_addon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_604ed8289e863.pdfIn PDF document text
    • http://zujavok.22web.org/computer_systems_engineering_and_computer_science_curtin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391899/normal_5ffd553989302.pdfIn PDF document text
    • http://sipamuxagiporen.iblogger.org/99892879474.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506159/normal_5ff1c1c9b84b0.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
    • https://s3.amazonaws.com/wizidimawag/src_bede_sixth_form_news.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/33234683191.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/rukumosadawi.pdfIn PDF document text
    • http://vorasatijede.rf.gd/rinnai_natural_gas_heaters_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/allah_hu_allah_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/xatevalad.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/2005_chevy_trailblazer_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/27733853788.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/2276242549.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10386 5068 bytes
SHA-256: 84bf8fdad038ee7bb43cce65aafd23e6cdf98ebe295e1f5bad1188a6144bae1f
font_01_sfnt_off000114d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D6 10428 bytes
SHA-256: 3f5e247adb2ed2bb543daf46d8d309d352a427c08f4a11a3aff0684c3c0b87db
font_02_sfnt_off0001388f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1388F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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