Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada3ee5951d8726a…

MALICIOUS

PDF

70.1 KB Created: 2021-02-18 16:54:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 551453a50ee329f2dd873e57862dd697 SHA-1: 6c8d16e2ff127a9a8757ef74f61dcb7c37e73e78 SHA-256: ada3ee5951d8726ad6d98223267c1f579f57b4818217bfa92693da98ad4abeff
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/123?utm_term=business+analytics+internship+work+from+home PDF link annotation
    • https://cdn.sqhk.co/pugudanirav/fOib09y/jefurulodalitoruzikovi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394072/normal_602b0812d1c0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_5fdb2eec3070c.pdfIn PDF document text
    • https://jerolukemotib.weebly.com/uploads/1/3/0/8/130874115/83cb24ad94fd5.pdfIn PDF document text
    • https://cdn.sqhk.co/lamikolo/jdR4Dr2/gekikejab.pdfIn PDF document text
    • https://cdn.sqhk.co/miropefaneka/voTK8gh/vakitidofebufozarija.pdfIn PDF document text
    • https://cdn.sqhk.co/dojidavos/UtjiIZY/warthog_red_vs_blue_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465941/normal_5fda689d76bdf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417207/normal_5ff7fe651b48f.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/gulapore/16006142739.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/cambridge_igcse_business_studies_5th_edition_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/bayliner_capri_2052_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/majesty_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/antibiotic_essentials_2017_15th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/the_creative_group_salary_guide_2020.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_off0000d62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62D 5564 bytes
SHA-256: 4a251cd8211fd9038bdcc92522ff70d368664c0233da7d46a535c44bf7c7067e
font_01_sfnt_off0000e90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90E 10004 bytes
SHA-256: 24ad513be8006ef116a8582d248b979b8cb008eae9b3d8a986dc00a448c67a5a