Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff03690f107435db…

MALICIOUS

PDF

75.0 KB Created: 2021-03-01 04:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c6f08748e1bf39fa37ac2dd0a428029f SHA-1: ad96415f2b0241c65e2ee253bb688c20c7c91c76 SHA-256: ff03690f107435db9c7c490c66a123bb3bc50114be69d62c98fdab937986b969
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://vilenefex.ru/strik?utm_term=samsung+bd-hm57c+no+remote PDF link annotation
    • https://fogolaliri.weebly.com/uploads/1/3/2/8/132814342/14672c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426571/normal_6022264d293e1.pdfIn PDF document text
    • https://xinelonaveguv.weebly.com/uploads/1/3/4/6/134606197/tunukulojebi-pijozafaviduvux.pdfIn PDF document text
    • https://sutovuwoti.weebly.com/uploads/1/3/0/9/130968995/9086424.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/ruririfulog_kimuvano_gokevus.pdfIn PDF document text
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/zogor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406516/normal_5fed979ea1ea5.pdfIn PDF document text
    • http://zixudivibudizu.scienceontheweb.net/ejemplos_de_dialogos_cortos_entre_2_personas.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/vavebufevodutob/42351605481.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/kurust_safety_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/40464368911.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/allotment_letter_format_for_maharera.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/90650243747.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/67486987341.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/morokuwejefojaketusok.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_off0000e7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A9 5800 bytes
SHA-256: 98260dd7290f6b25badc26c3603770799ae34dbbc5c69fdcd5936e4583a00116
font_01_sfnt_off0000fb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4F 10632 bytes
SHA-256: 76f4ba9d14739bcc8264e4bd71f14f33041257c86ff8c0f851a374c310907b59

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