Malicious PDF — malware analysis report

Static analysis result for SHA-256 63448e2b8b8fe1a3…

MALICIOUS

PDF

69.4 KB Created: 2021-02-14 08:02:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f4f6242b519f1c34d2e8ad8f38011f53 SHA-1: 6c07b7a0acff52acc9802d67c898611f114288df SHA-256: 63448e2b8b8fe1a3e14600c2b60542eaa2a3be2cfaecc137d3e7bda6835edd1b
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://jottigo.ru/wix?keyword=minecraft+indev+download+mac PDF link annotation
    • https://cdn.sqhk.co/nugopanage/ibTyjcA/cinema_light_box_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/emBhcv4/zubepatasoj.pdfIn PDF document text
    • https://pesopipuni.weebly.com/uploads/1/3/2/3/132303043/noguwika-wadizaxilage-mezijawilo-runibulomepulo.pdfIn PDF document text
    • https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/lubinowep_pexugemi_fidatanun_sofawu.pdfIn PDF document text
    • https://muxoramosuzuveg.weebly.com/uploads/1/3/4/2/134266249/tovanobujowo_talozis.pdfIn PDF document text
    • https://zirefugat.weebly.com/uploads/1/3/0/7/130740019/gaxemexodesabi-kuzaxomuzigame.pdfIn PDF document text
    • https://megidawuxuta.weebly.com/uploads/1/3/4/7/134729580/sujunex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495269/normal_6014901ee333f.pdfIn PDF document text
    • https://pibezenasa.weebly.com/uploads/1/3/1/4/131454503/b27c688804178.pdfIn PDF document text
    • https://zuwanefo.weebly.com/uploads/1/3/4/0/134040462/8bad9e1.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/lupuvogotog/budgeted_cost_of_work_performed.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/phenol_chloroform_dna_extraction_principle.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/police_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/fikapowizojulazudejut.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_off0000d377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD377 5144 bytes
SHA-256: 342ca3fff47e66ad1076ed4dac35d7c2c0a9612dbcc4aa6532174e82de89531b
font_01_sfnt_off0000e50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50A 10452 bytes
SHA-256: 2a99f8e85b5585d9b6d6fd830e0423e0d4af5448aa15b8044706f0f216de7d69