Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c592020b901ac4c…

MALICIOUS

PDF

66.6 KB Created: 2021-01-30 18:00:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 498374983d4c0ad01dee648f3e62a9f3 SHA-1: 4252a7260dd1f3ee95dc146b4f5649367eb61e8f SHA-256: 8c592020b901ac4c857236eb5a083113f77e05cf9428bd0f57b4c80a2a145b9c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/wb?keyword=toca%20kitchen%20sushi%20restaurant%20mod%20apk PDF link annotation
    • http://missunik.space/335553577054fy5g.pdfIn PDF document text
    • https://wuwotozon.weebly.com/uploads/1/3/4/3/134315251/9034120.pdfIn PDF document text
    • https://fuvapevamasazu.weebly.com/uploads/1/3/4/5/134507747/ronuxidobuzezilenoz.pdfIn PDF document text
    • http://mattelipsticks.site/2550724247807280.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408595/normal_5ff5fe7190880.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421983/normal_5fecaf497ba9a.pdfIn PDF document text
    • https://kisuvali.weebly.com/uploads/1/3/1/1/131163683/7199592.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502178/normal_5fced6007c522.pdfIn PDF document text
    • http://datingdate.site/42614237047zc8xh.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/20802886494944sb.pdfIn PDF document text
    • https://cdn.sqhk.co/sunawopi/dG25OSd/gojavewajipizaduvanip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitirew/android_tv_box_4gb.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/student_swot_analysis_example.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/bootstrap_form_input.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/63978030881.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC841 5292 bytes
SHA-256: 6048bed67d6e78348ce17e52ef4ac192aefe237d1c8c98a36dbd201d5cbc946b
font_01_sfnt_off0000da19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA19 10872 bytes
SHA-256: 8f1298c8c84f0f14e9a6401a2a9ba36e20e3c5792d57410330f1b07a5c79aa7b