Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ea89e8584c1b2c…

MALICIOUS

PDF

76.1 KB Created: 2021-03-09 23:49:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe1786da0f65b7da86b160d3cf2cafcf SHA-1: fd253d0d76c1dcf80044be95cbb5b0d1eae70d6e SHA-256: 59ea89e8584c1b2c95a3fd480f8c7f8f7f78fa9f9fa078d4ac9bfe6055970b94
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, yafferge.ru, which is disguised as a treatment guide. This indicates a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of the file. No scripts were extracted, but the presence of a malicious URL is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9819

Heuristics 4

  • 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.
  • 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 differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/award?keyword=nausea+and+vomiting+treatment+pdf
    • https://cdn.sqhk.co/bukevexej/jCUggYi/farming_master_3d_mod_apk_revdl.pdf
    • http://gidpopiteru.com/roomba_530_service_manualp2lco.pdf
    • http://smeshnoykir.space/international_phonetic_alphabet_transcriptionlj55w.pdf
    • https://cdn.sqhk.co/tuwesedujila/swD9geH/94781457955.pdf
    • http://letgtma.bid/stanley_wet_dry_vac_4_gallon_filter84hn7.pdf
    • https://togawakavepanef.weebly.com/uploads/1/3/1/1/131163752/92272.pdf
    • http://scm03.ru/lojizixozujareluzothiaor.pdf
    • https://cdn.sqhk.co/suwajipufo/jjcx10Y/loner_yungblud_lyrics_traduction.pdf
    • http://detonic-de.website/customer_service_skills_for_successoe8zj.pdf
    • http://cardioactiveufficiale.site/mailing_label_template_for_ms_wordmo19e.pdf
    • https://cdn.sqhk.co/puvubuzu/hihjtjd/8619275862.pdf
    • http://mibejar.sportsontheweb.net/38845074219.pdf
    • http://thiswaytovogue.com/how_to_structure_an_english_conversation_classes_at_homecllmc.pdf
    • http://organize.shop/94829090509xw7gd.pdf
    • http://loveantravel.xyz/jikimuwuvomidewadigusemed8x06a.pdf
    • https://dafebifu.weebly.com/uploads/1/3/4/3/134399244/gisorogaziworufizala.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nuruvapozixix/89623422954.pdf
    • http://luxupuxud.myartsonline.com/delta_flight_attendant_jobs_atlanta_ga.pdf
    • https://s3.amazonaws.com/lonozote/lilebesovamula.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8bb.bin
6a17353b2e366a12137b46ad5f425ae922abda50867f97be0304567d691a182d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 5356 bytes
font_01_sfnt_off00010aec.bin
385f15caa309102c6144e16da253e24e1a523b4d532b54025d640ec9e6acc6dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEC 10136 bytes

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