Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1315586d71500bd…

MALICIOUS

PDF

66.4 KB Created: 2021-02-14 19:56:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c91eb58416173c258163bda0551acf1c SHA-1: 01f7d078c9bdbf03efd8bef72ce789ef7ac25a36 SHA-256: c1315586d71500bd1d6f8a48916bb611c4ef2f1f36724768a3d93e60040e08cb
196 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
  • 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=denim+jacket+design+template PDF link annotation
    • http://instapresent.site/viturujiw5n24a.pdfIn PDF document text
    • http://requiredjokblog.com/gezemasudizapojarzzff.pdfIn PDF document text
    • http://badgesverified.com/xesigqkdr2.pdfIn PDF document text
    • http://lisolu.org/double_bed_bedsheet_flipkart1g34w.pdfIn PDF document text
    • http://baby-slings.ru/news_reporter_interview_questionsayid1.pdfIn PDF document text
    • https://zagukosi.weebly.com/uploads/1/3/4/3/134314994/3000fc018d9fd9.pdfIn PDF document text
    • https://vewutuzukep.weebly.com/uploads/1/3/2/8/132815207/9058699.pdfIn PDF document text
    • https://cdn.sqhk.co/xitilesuxiw/cCFNbuY/84982180516.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/jcjbuTj/71418247792.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/doxifuba/aplicativo_bom_para_baixar_musica_no_android.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/nevuzisiwa.pdfIn PDF document text
    • http://kasanuvuwa.epizy.com/alphabet_banner_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/72020586330.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/bexley_grammar_school_uniform_shop.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/film_boboiboy_the_movie_2_mp4.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_off0000c736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC736 5436 bytes
SHA-256: deaa147bd4006223a957975fd60c1bf3138152d62bb71b99b0ca5101dc01a873
font_01_sfnt_off0000d9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B4 10424 bytes
SHA-256: 43be67a1f40d87465f064b75a8a285c817599b526cb6d8e3d5b6a11cc381ca7b