Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b9b180abb33ed2…

MALICIOUS

PDF

77.2 KB Created: 2021-02-20 16:07:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b1f014d862cda7ce1dfb022dd37fba71 SHA-1: e0ce37075e88137e3635666d1ca31e643eb959ea SHA-256: 97b9b180abb33ed2f1dba95a927cc913d8b8889e455557c2843302b954d2a540
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://maypoin.ru/aws?utm_term=what%2527s+a+good+gym+routine+for+beginners PDF link annotation
    • http://sibuvre.com/509574783794fucg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417998/normal_5ff3cb7b97ff3.pdfIn PDF document text
    • http://pojezer.iblogger.org/is_mortal_engines_a_good_book.pdfIn PDF document text
    • https://bopevifobomamak.weebly.com/uploads/1/3/0/8/130814579/9e07e51ff13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449605/normal_600ea74d4d727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380857/normal_5fd5f9f2c7d6f.pdfIn PDF document text
    • http://itchia.space/156770709634a2xv.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/putelekireza/barbershop_sheet_music_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/bukogenafusot.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/27786316632.pdfIn PDF document text
    • http://wonavoka.epizy.com/tuxotesorotavi.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/kelington_group_berhad_annual_report_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/88907940454.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/fokuboferipojujutexixofut.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/modal_verbs_perfect_english_grammar.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_off0000f031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF031 5576 bytes
SHA-256: 7046c4599f9346424fe0b8e8a9e12f3513d2ae5aa119f115f2fb0135af3e172a
font_01_sfnt_off00010316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10316 10720 bytes
SHA-256: 2f9f5d14ecc1d3ccfdf8b5011dafe6f1868a3bcee27ff6385db23fc487795e66