Malicious PDF — malware analysis report

Static analysis result for SHA-256 427768413bf8f767…

MALICIOUS

PDF

72.6 KB Created: 2021-02-10 02:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 003a56efd8f14707d72351f7839b0614 SHA-1: dd38f7a4712cfff92796fbe4e737ece163eb69ad SHA-256: 427768413bf8f767c0fdd1c666b5264b7961113f8657187fe55c0a9de2db2999
254 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
  • 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 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.
  • 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://crophysi.ru/wb?keyword=amd%20fx%206300%20overclock%20performance In PDF document text
    • https://zixokamewi.weebly.com/uploads/1/3/4/3/134386319/midobemu-gizakasamozive.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386621/normal_5fde7e29499d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404121/normal_5ff8901b88ced.pdfIn PDF document text
    • http://nagesebaz.iblogger.org/lakoto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411479/normal_5fffe91971bfc.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/4MRhfia/3141496054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391611/normal_601da9547b48e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5fd9421253c1e.pdfIn PDF document text
    • http://dobafeser.66ghz.com/bpm_ka_full_form_in_medical.pdfIn PDF document text
    • https://cdn.sqhk.co/fapiwejagiz/CDFPhic/jetikowowimolotabula.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495843/normal_60099013f2b58.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/e4it9hj/3606049460.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/KBhi431/jizajawafov.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/iir6V0B/kuwodalaneketefunugik.pdfIn PDF document text
    • https://fosevikotik.weebly.com/uploads/1/3/1/6/131637163/vagera.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443329/normal_5fcb71e9a0ac4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dobevux.epizy.com/64188723599.pdfIn PDF document text
    • http://javasuk.epizy.com/gexejejuze.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_off0000dccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCF 5764 bytes
SHA-256: 92e23d8ee0b5a2a44caae3e19fe159500ac7ef2c2303932be3674eea2952ec3b
font_01_sfnt_off0000f066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF066 10852 bytes
SHA-256: c2b85333d8eb2d471a2c89fe3922d6c2fc4619102178e3bc53a2ec3c38c95376

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