Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeaef7fc16fb7df9…

MALICIOUS

PDF

73.0 KB Created: 2021-02-28 20:33:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 34e8c0013a15182981207809f9431f7f SHA-1: fed811199cefbf39d0e714062f807f3654887459 SHA-256: eeaef7fc16fb7df98bacbe6e54f55800b58bedb52dd63240d7dac081c1708cda
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://jacksth.ru/award?keyword=what+is+the+tone+of+this+passage+song+of+myself PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374521/normal_601bfaa1cc3a4.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/AiljiJW/33325711697.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/jgNJKMu/tebusalumus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_60153e1ab58b2.pdfIn PDF document text
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/368578.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/6hjhhhE/30751980540.pdfIn PDF document text
    • https://cdn.sqhk.co/bopelara/cCgc1gg/71361668515.pdfIn PDF document text
    • https://lesikikonojen.weebly.com/uploads/1/3/0/7/130740189/9474943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496391/normal_600e4e9bc250e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403260/normal_6011f0c8f11d7.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/jhehbGq/positional_vertigo_icd_10.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/jOijghp/tiki_kart_3d_hack_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402014/normal_6001d974b99bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454559/normal_5fe4e63db2774.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_60145eab1ec3b.pdfIn PDF document text
    • https://jafuxudaxifi.weebly.com/uploads/1/3/0/7/130739212/e49897686d8cf.pdfIn PDF document text
    • https://gufiferufa.weebly.com/uploads/1/3/2/3/132302963/3151938.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_off0000e161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE161 5332 bytes
SHA-256: 7b8f22703f2cd9a3865d6d99fd0c3b3a445ed0c74d5a02aace8ab437e265ee7a
font_01_sfnt_off0000f37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37F 10184 bytes
SHA-256: 3d424ea5bd5f2e7bd6c957c13dc36b1fe3a0e0419cc4f48763aadcafa7a80939