Malicious PDF — malware analysis report

Static analysis result for SHA-256 239d8fa09d084cd4…

MALICIOUS

PDF

70.9 KB Created: 2021-02-14 00:37:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: df72f283277c5646fc863b9c4cc08741 SHA-1: 767b9126c3b5cb9d80a5ac79eac8a988b5670d6e SHA-256: 239d8fa09d084cd4a6b7d8cf2b42b02619f5168a1f84b13b7488ae2f1d4f5f27
196 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
  • 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://jottigo.ru/wix?keyword=powmr+mppt+solar+charge+controller+manual PDF link annotation
    • https://sutopudebesi.weebly.com/uploads/1/3/1/4/131438093/4148221.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388619/normal_5ff8afb8b2ed7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445324/normal_600a11b3940ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447280/normal_5fc969efb24af.pdfIn PDF document text
    • http://tourist.fish/3818803482381aha.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473415/normal_600dd36e4b022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_5fd7911b635dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417805/normal_601d2b026fe62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387704/normal_5fe8f1c6374bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382771/normal_5ff1bb90c33fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456712/normal_5fdfffd84d7a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459466/normal_5feec4703b75c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482863/normal_60120bf15154f.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/kezemiradigu/marathi_horror_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/66998139582.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/bowesibabum.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/23388543004.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_off0000cd0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0F 5440 bytes
SHA-256: 62389a3620e2a51d3d17452cbf23bd6d223ed22a6c726c8be5eea0bd41e04fe4
font_01_sfnt_off0000df73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF73 14244 bytes
SHA-256: 5003fcdee1f9feb594664376aa7791bdb022bec6befed157aaf1e526d8d38d40