Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b8e0d355988cef…

MALICIOUS

PDF

72.8 KB Created: 2021-02-16 23:09:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 530aeaca7889616ae75026f9fc56975e SHA-1: 3cf1394979432d964741a777f1aedbe4d2cae75c SHA-256: 96b8e0d355988cef9a8f5c31285fad187cd7b921b6fc06867c9d08863fb45f9e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=how+to+turn+off+alarm+timex+expedition PDF link annotation
    • https://xudekumuf.weebly.com/uploads/1/3/2/6/132681038/0c81a16945af418.pdfIn PDF document text
    • https://felilediwifagid.weebly.com/uploads/1/3/1/4/131453780/vukenig-zilixaledi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388613/normal_60065c350fd47.pdfIn PDF document text
    • https://zuwiliwiwira.weebly.com/uploads/1/3/1/0/131071082/puwinefo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424689/normal_5fe4180acfcb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485308/normal_5fcc22741a9de.pdfIn PDF document text
    • https://sotokogel.weebly.com/uploads/1/3/4/2/134266154/gekoragowesoket.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378599/normal_5feb008e64dbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421960/normal_6026e5299e5ca.pdfIn PDF document text
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/3639420.pdfIn PDF document text
    • https://sozizupisez.weebly.com/uploads/1/3/1/8/131872239/7e805e05128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_6017fb3783933.pdfIn PDF document text
    • https://barobinamad.weebly.com/uploads/1/3/4/7/134756413/7787927.pdfIn PDF document text
    • https://buzikapafopix.weebly.com/uploads/1/3/4/3/134375334/db15e.pdfIn PDF document text
    • https://kozegefiseram.weebly.com/uploads/1/3/1/3/131379202/siwarapatonemi-kidax-disizinon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470985/normal_5fe4d8dd5ac88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476927/normal_5fd30fab2194e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374542/normal_5ff32800cd662.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ddd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD8 5128 bytes
SHA-256: 68cdfdfb716c304efba27ef7e9b3b7fffb4d94cc9baac64c36a92f3b54ee93a5
font_01_sfnt_off0000ef48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF48 11572 bytes
SHA-256: 9d43b0ca2d3cfeb7dcf9f803f6066aa934a9c74b51bb843653dc1eccc5858fa6

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