Malicious PDF — malware analysis report

Static analysis result for SHA-256 da2cc3a32bfce646…

MALICIOUS

PDF

69.7 KB Created: 2021-03-03 05:27:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a84ac9a0478ca3c72fb9fafa912ae58b SHA-1: 3d636bd369ce042bf0fdfe19734575dc9bf03fd1 SHA-256: da2cc3a32bfce6469560c9f2ae7d39f6e8abe5e92a37cc9fe8754fdbaa4c7032
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/award?keyword=sonicwall+tz+100+all+lights+flashing In PDF document text
    • https://cdn.sqhk.co/bevoletef/hejemBx/management_skills_assessment_center.pdfIn PDF document text
    • https://tubonizuruzoxuk.weebly.com/uploads/1/3/0/9/130969435/1ea4307be.pdfIn PDF document text
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/pavupagarugesu_xuvonar_musufugugosuso_puwagaro.pdfIn PDF document text
    • https://xigologilajuveb.weebly.com/uploads/1/3/4/6/134672854/pofox.pdfIn PDF document text
    • http://nejuwenazi.iblogger.org/hp_greeting_card_quarter_fold_template.pdfIn PDF document text
    • https://resonorur.weebly.com/uploads/1/3/4/8/134874279/fojuvafotugi.pdfIn PDF document text
    • http://dunizajo.66ghz.com/dibixonoxubodile.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wedofisirix.epizy.com/cessna_172_annual_maintenance_costs.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/97904386657.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/25358519072.pdfIn PDF document text
    • http://tinipukax.epizy.com/motelizem.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/condensation_evaporation_melting_freezing_worksheets.pdfIn PDF document text
    • http://xefukogan.rf.gd/71288440109.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/11357614573.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/hajj_and_umrah_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/medscape_physician_compensation_report_2013.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_off0000d359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD359 5484 bytes
SHA-256: 7fec742185da5eeae84b86f533f9bee44a0d4443b20c979b4f8734d08ba76c99
font_01_sfnt_off0000e627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE627 10412 bytes
SHA-256: e58d7d686436d47b703d51d95227c8f685632051e9003495a135b316a092a842

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