Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6463c4bb00d6f45…

MALICIOUS

PDF

77.3 KB Created: 2021-03-31 20:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a50aabaad2126011b6790bdaf2580ba4 SHA-1: 9c8d3c7db0283cd3f6efaf4c0b1f9f75db4400e3 SHA-256: c6463c4bb00d6f45b0d3de7d165bc7f0c180af536ecebfb635044bb206e53e13
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 0.9997

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/strik?utm_term=how+do+you+fill+up+a+brita+water+bottle In PDF document text
    • https://cdn.sqhk.co/jiluputumusi/xgejd7r/34966723538.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423452/normal_5fcf2ee4785ce.pdfIn PDF document text
    • https://fujerituzaxu.weebly.com/uploads/1/3/0/7/130775231/743198.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425921/normal_5fce66eed181b.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/hiHiihs/gudoxilibuxisef.pdfIn PDF document text
    • https://cdn.sqhk.co/tiviluluje/jhFhf1j/kingdom_new_lands_knights_attack.pdfIn PDF document text
    • https://cdn.sqhk.co/mifopanikil/cwighas/kezejadofogasodolu.pdfIn PDF document text
    • https://cdn.sqhk.co/kidurukazag/bdBiigc/28195950159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494893/normal_601f6489d9c0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480591/normal_60414041c280d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488592/normal_5fcd768fc8fd7.pdfIn PDF document text
    • https://bamususifilozok.weebly.com/uploads/1/3/1/3/131383301/juwijo.pdfIn PDF document text
    • https://cdn.sqhk.co/labojime/P6ja9ge/bluestone_paver_patio_ideas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383132/normal_6004d771d681b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487194/normal_601ae1e6edb91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376625/normal_5ffe4feaacd65.pdfIn PDF document text
    • https://cdn.sqhk.co/mivezifov/FhiHhgf/64812775129.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/vudivuzakal/3411628810.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/57983212780.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/act_practice_test_5_answer_key.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_off0000e42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42B 4928 bytes
SHA-256: d88f147227ad58f0e3b3bf89c9b7cc052610db7c4134e46f1b1a23516920fbfa
font_01_sfnt_off0000f514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF514 10624 bytes
SHA-256: fb27aebad016d9a49a726089aab084694e29827f7d774ce47ae7e3fa6eab7387
font_02_sfnt_off00011989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11989 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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