Malicious PDF — malware analysis report

Static analysis result for SHA-256 f16e288dc94bc756…

MALICIOUS

PDF

161.4 KB Created: 2021-02-08 09:09:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fc0851896e759c63fc0e96cd8bdd2e2d SHA-1: 880c038523457283b6bc58884b01294f7f90f1c3 SHA-256: f16e288dc94bc7564f3a8ff0401fceee140382c92051709b9c1abbf703fbf958
162 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. It uses an urgency-based lure. 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 0.9994

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=cisco+ise+2.+3+patch+3 In PDF document text
    • https://cdn.sqhk.co/wavagowew/jzhfhiM/thrift_stores_near_me_clothes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484835/normal_5fefc616a4b5f.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/cXXmfh4/all_star_celebrity_basketball_players_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/xhdicii/22231720958.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/hwqnjjX/97120332801.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/hehbjep/reverse_pacifica_fanart.pdfIn PDF document text
    • https://cdn.sqhk.co/pabulibig/QSJYjbI/50343178579.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481163/normal_5fe02d2e0374a.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/QPMdgjW/jexugux.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/rhg5sjj/rank_of_a_matrix_eigenvalues_and_eigenvectors.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375210/normal_601be2fe9b0bc.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/DhdiaB5/super_mario_maker_2_beginners_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/pigalixow/dhfswVm/68870401807.pdfIn PDF document text
    • http://wozutujetotox.iblogger.org/vobulawix.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/aTidWAs/feed_the_zombie_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/gfghxgd/126698314.pdfIn PDF document text
    • https://cdn.sqhk.co/geruxibab/Sjd6xyc/noguxivewakukupisamu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gojexevetefe.epizy.com/everquest_beginners_guide_2019.pdfIn PDF document text
    • http://nawonuzegajosi.epizy.com/walofakewuvew.pdfIn PDF document text
    • http://kegibuluwuridof.epizy.com/sunetizifufukudewafepiluz.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_off00021126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21126 14332 bytes
SHA-256: 88d1d66d5258f73f3eb9257840fc2eaa3e11de513ad65eac502e58681e84bfb1
font_01_sfnt_off00023ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23CA0 5124 bytes
SHA-256: fc8abe5f44808cd6d9519791ef270196b68891f95a9fa06befa0f71e99d78014
font_02_sfnt_off00024e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24E14 11648 bytes
SHA-256: 77fb7297570363a8bef760f4c102d748e63df428fdfe5eb4a0e64cf963d31ae7

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