Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10d7128b44714de…

MALICIOUS

PDF

35.3 KB Created: 2020-10-30 06:20:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 34db5a4707157527214da4c4ecc4ac27 SHA-1: c10f492455ee30e8b9ccdd9857654f44c9ebc1b6 SHA-256: e10d7128b44714dec728a5ce1584fbb9276315e72ba7350ddb52ab74156d6bad
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ttraff.link/pify?keyword=jet+preformance+chips In PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/fubaxin.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/tijixu.pdfIn PDF document text
    • https://zidabowejixu.weebly.com/uploads/1/3/1/1/131163559/6595861.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00004d44.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00004d44.bin)
    • https://s3.amazonaws.com/henghuili-files2/rodejerib.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/fifevab.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/rupuxevirunowenosuduwapi.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/there_will_come_soft_rains_comic.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/ich_analytical_method_validation.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/68003564250.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/munaxibadanonelegetalowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da1f8b51-2c2a-415d-b80c-d1ee921b2382/nawabezakilaje.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/classroom_activities_for_english_language_learners.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/traditional_chemistry_ionic_formulas_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/39277966348.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 extracted file (font_00_sfnt_off00004d44.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D44 5212 bytes
SHA-256: 1a5de4e3725c6e9dbac944e49edbb746afe46a80926807b5e3eec4754295d5f5
font_01_sfnt_off00005ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED4 9728 bytes
SHA-256: 72a30884296b03d1ebde9af5aafe20345f500dfcff53be1bb9998e4f0b2fb31f