Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b8153e2027080c3…

MALICIOUS

PDF

66.0 KB Created: 2021-02-07 20:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 393926b452753b74fa62d0a543d6d6ca SHA-1: 795be13c8351dffdcc8f09f1e4f3be26319b6791 SHA-256: 1b8153e2027080c3daa5cc71e9df1a72c14a6ac208b05dfc0ad62cd4019f86e2
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://seumenha.ru/wb?keyword=factorising%20quadratics%20questions%20with%20answers PDF link annotation
    • http://gelivebun.22web.org/kugususubawezanakig.pdfIn PDF document text
    • https://xowitato.weebly.com/uploads/1/3/0/7/130776358/bujox.pdfIn PDF document text
    • https://fugebigejajifad.weebly.com/uploads/1/3/1/4/131406613/javoxuj_wusomesoxujufo_zotedomefo_bajarilikerate.pdfIn PDF document text
    • https://donabetolemi.weebly.com/uploads/1/3/1/6/131637402/nopunorawalela.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_6016c5930ff21.pdfIn PDF document text
    • https://fasukawoj.weebly.com/uploads/1/3/1/4/131453618/874bc4.pdfIn PDF document text
    • https://rezigetofetima.weebly.com/uploads/1/3/1/1/131163738/wetabezofidebag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479212/normal_6008d69a5144c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kebinuwozumen.epizy.com/abs_academic_journal_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/deutsche_telekom_financial_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/neboxa.pdfIn PDF document text
    • http://jiwuwusa.epizy.com/kozevuduroxagetorixoxom.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/brene_brown_rising_strong_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/pdf_to_word_support_arabic_language_online.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/big_ben_esta_em_reforma.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_off0000c435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC435 5340 bytes
SHA-256: bb843e4d993763c3a643b9c6e5cf973d232c2cfa175c59c0ad7426fce2a67dc8
font_01_sfnt_off0000d661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD661 10644 bytes
SHA-256: 8e95db290976708b9fc67f521db8d61878a208d1e87b4ead04c1c3d41082d27c

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