Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e025ba55d693e0…

MALICIOUS

PDF

90.2 KB Created: 2021-02-21 05:00:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fec7cd3c7dcff4a8a1ef24032adb6d1a SHA-1: 8c0db40e04c656760e0e6a847574ea233455111c SHA-256: 13e025ba55d693e0775ffe3644101661dc8939412a42ca859e0bda26c1eb7375
182 Risk Score

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 embeds a large number of external links characteristic of an SEO link farm and 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 0.9602

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.
  • 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.
  • 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=teaching+active+listening+skills+and+strategies In PDF document text
    • http://votofeveta.iblogger.org/98841527681.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378599/normal_5fe1b1132e055.pdfIn PDF document text
    • https://tudogevu.weebly.com/uploads/1/3/2/7/132741144/pixav_fekana_semivup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368481/normal_5ff073a4bfa54.pdfIn PDF document text
    • https://wojaginobaxap.weebly.com/uploads/1/3/1/8/131857211/jabesila-fupofim-futaminojebadut-babadotanomulu.pdfIn PDF document text
    • http://goldstein.capital/at_the_cross_hymn_chords_in_cu3lze.pdfIn PDF document text
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/legunazenupukul-moliji.pdfIn PDF document text
    • http://otomail.business/jupisozeputulojuniwijujaueg2g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460251/normal_6013b192d2f8e.pdfIn PDF document text
    • https://wipuzene.weebly.com/uploads/1/3/5/9/135971348/mututapiza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zagawajali.epizy.com/anbanavan_asaradhavan_adangadhavan_full_movie_1080p.pdfIn PDF document text
    • http://fuvituze.epizy.com/18691300489.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/rifutizisowubise.pdfIn PDF document text
    • http://piwefijegiv.epizy.com/17945134738.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/sharing_economy_platform_capitalism.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DF9 5276 bytes
SHA-256: f713062efd3668a9dfb5192ec08d1a7ed6e7ede5cc7dbc5202e04727a88d6179