Malicious PDF — malware analysis report

Static analysis result for SHA-256 208a151d6fc148fd…

MALICIOUS

PDF

71.2 KB Created: 2021-02-22 20:40:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: fe15ebeb3123ff96623cbca1461ad6ee SHA-1: d29e0c34a727ed92e5a4ca873b01b5e6aae3ed4c SHA-256: 208a151d6fc148fd64f1b4847e897ebb0da9aa461f229ac2feeadc64f3ff6523
254 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
  • 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://crophysi.ru/wb?keyword=invisible%20cities%20by%20italo%20calvino%20summary In PDF document text
    • https://bosamekuxukis.weebly.com/uploads/1/3/4/6/134672370/c7a6b27371c.pdfIn PDF document text
    • https://balolekuzuwuvaz.weebly.com/uploads/1/3/0/7/130740598/pazinadab_vekefejutepa_zuroduratidimi_navatedotiw.pdfIn PDF document text
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/votel_zodobode_dazuwikupeloges_pireberale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383915/normal_6007553168e84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379038/normal_5fd1bfd971d3a.pdfIn PDF document text
    • https://guravigipide.weebly.com/uploads/1/3/2/8/132815190/5924004.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380692/normal_5ff7a70d5d321.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366339/normal_60038ccf11f7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381756/normal_5fce8647cee9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374535/normal_6002c42de0a4b.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/jewizopukuni/dbt_skills_worksheets_linehan.pdfIn PDF document text
    • http://rigitusavogu.epizy.com/9070495475.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/guide_dmarches_administratives_aprs_dcs.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/list_of_architects_in_delhi_ncr.pdfIn PDF document text
    • http://jipezanegasan.rf.gd/16248213077.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_off0000d87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87A 5184 bytes
SHA-256: 700eb1302353bddcb209fe23987f286d3edffcb7733f6224ad32eb17fa61bb4f
font_01_sfnt_off0000ea13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA13 11552 bytes
SHA-256: 958ea2ac4f343c0769abfcadee44a67548bac7d4f21da5cdca139bb65a8505c5

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