Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceab8d9d087e7af3…

MALICIOUS

PDF

74.4 KB Created: 2021-02-13 07:23:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f88de3ab1678e088a618a27c8f41f51d SHA-1: 6ade10a59125f2bfbce9972a5da48d8b95ebbc4e SHA-256: ceab8d9d087e7af3a226d24f9572055e028db094604ec03cb06f1bbd63ca248b
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/wix?keyword=fission%252Ffusion+worksheet+_k PDF link annotation
    • https://rumobenugata.weebly.com/uploads/1/3/1/4/131454452/2166582.pdfIn PDF document text
    • https://vegonivi.weebly.com/uploads/1/3/5/9/135986737/8846906.pdfIn PDF document text
    • https://gisafonenum.weebly.com/uploads/1/3/5/3/135323636/5489771.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://noxudovo.rf.gd/77126051692.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/vba_dim_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/project_closeout_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/74077167331.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/dekokanogadofudirakulo.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/gold_wedge_platform_heels.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/69644682877.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/34770257320.pdfIn PDF document text
    • http://dikivila.epizy.com/86564129705.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/marvel_avengers_alliance_2_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/bizhub_c224e_spec_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/pozelulegewona.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_off0000e6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A9 4792 bytes
SHA-256: b709436f7906a69a8b4373ddd91eb69b60356bef3e710d33888716f133c9643e
font_01_sfnt_off0000f71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71B 11108 bytes
SHA-256: 0d37159d533d17d4048bb39206bc975a3b19be8ca9ea892d3c046e7bb8d6dd5d