Malicious PDF — malware analysis report

Static analysis result for SHA-256 df04c4ac057a2e8a…

MALICIOUS

PDF

71.0 KB Created: 2021-02-27 03:45:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8e6ab545522677cce29eff13b1e7f12d SHA-1: cab7255f6e675bd9c78884a9851bd1eb2a2c7bef SHA-256: df04c4ac057a2e8a6303c35b678ad6b597fa2dfeb449ff4f12ab5542b721b3ee
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/award?keyword=thermo+king+reefer PDF link annotation
    • http://mosdendy.store/452310234775i1xr.pdfIn PDF document text
    • https://nekemobo.weebly.com/uploads/1/3/5/3/135323096/6231471.pdfIn PDF document text
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/fasokagokavuxikupimi.pdfIn PDF document text
    • http://zumepaposakuf.scienceontheweb.net/lezudaxavopo.pdfIn PDF document text
    • https://cdn.sqhk.co/tipapija/4gfjeja/cat_keeps_jumping_down_from_high_places.pdfIn PDF document text
    • http://snatural.space/fejikirusuxaam3.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/520163331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476148/normal_6016f3e5aada5.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/what_is_grounded_theory_analysis_in_qualitative_research.pdfIn PDF document text
    • https://titezexi.weebly.com/uploads/1/3/4/6/134639754/vavixufe_wuwevon.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/pegebunov/13034954010.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/2018_calendar_with_indian_govt_holidays.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/16391949381.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/majesty_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/anolini_al_formaggio_parma.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_off0000db15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB15 4776 bytes
SHA-256: cc4d13e59c631afeea228385d82651317df0bc2407e1e24eff69848ca3bb2071
font_01_sfnt_off0000eb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2D 10676 bytes
SHA-256: 1a235753ab8b55c10be6a36ad0d13662e8379033ff2d4d524b7d8cde52affbee