Malicious PDF — malware analysis report

Static analysis result for SHA-256 599017512ab3d505…

MALICIOUS

PDF

68.1 KB Created: 2021-02-10 21:22:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c72f262c25aca375ee28ef5aaa073d8d SHA-1: 95745933236d06e0f10091762b684c40cbf603b0 SHA-256: 599017512ab3d505d3deb704011ca805e231d81c0d63b9f5fd835bda4a1c184c
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://yafferge.ru/123?utm_term=kingdom+apk+mod In PDF document text
    • https://static.s123-cdn-static.com/uploads/4377935/normal_5fe439cf02d19.pdfIn PDF document text
    • https://fifofisepag.weebly.com/uploads/1/3/5/9/135985139/gilijisonirel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495251/normal_5ffe492c1f42d.pdfIn PDF document text
    • https://seguvixezamab.weebly.com/uploads/1/3/5/9/135961197/marifesulefepidob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420036/normal_601d14f13a274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481403/normal_6019d2a801eb0.pdfIn PDF document text
    • https://timijajuvage.weebly.com/uploads/1/3/2/6/132683040/1ccdff68d.pdfIn PDF document text
    • https://derovidexaw.weebly.com/uploads/1/3/1/3/131382126/4877446.pdfIn PDF document text
    • https://cdn.sqhk.co/dijexovesaf/a0Dicgd/68889124656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484612/normal_600d50b2cf92f.pdfIn PDF document text
    • https://gipulafu.weebly.com/uploads/1/3/4/4/134442702/6bc13be52c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415302/normal_5fc7eaf4ad3d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406169/normal_5fd31c5174a88.pdfIn PDF document text
    • https://zibinileder.weebly.com/uploads/1/3/4/7/134748255/1e7f52ef171.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374519/normal_5fce0eed54782.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ccfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFC 5008 bytes
SHA-256: cf6f50d5b0831489d9583c3865a86d67929f1342713265a949174c70b4a6d4c3
font_01_sfnt_off0000ddf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF6 10700 bytes
SHA-256: 77f1cfb5d04805891c387bdf295488049e97d900abda77b778991f551fe9e6f2

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