Malicious PDF — malware analysis report

Static analysis result for SHA-256 4596847f0c559494…

MALICIOUS

PDF

71.5 KB Created: 2021-03-01 20:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 65a792f9b2a2c636fbdaccc2e02942d0 SHA-1: 6e451f52123861de6d7ff0420b96635b5857fcaf SHA-256: 4596847f0c559494eb7fbfa1c222ab1a11a3eea3390421f8403529bf254d956a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/award?keyword=what+foods+to+eat+and+not+to+eat+on+mediterranean+diet PDF link annotation
    • http://zavodtriumf.com/49673147856cg5gl.pdfIn PDF document text
    • https://kuvolobogon.weebly.com/uploads/1/3/4/0/134012650/e5f76200.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/94656038352.pdfIn PDF document text
    • http://gachihyper.xyz/29265015482kjvp6.pdfIn PDF document text
    • http://prazdnikprosto.ru/mosobovejom3ahp.pdfIn PDF document text
    • https://menudobuwowewil.weebly.com/uploads/1/3/4/7/134765252/zemejutovewape.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405184/normal_5ffd3acf30b17.pdfIn PDF document text
    • https://nimekeboxiz.weebly.com/uploads/1/3/0/8/130873861/8773447.pdfIn PDF document text
    • http://busimaderule.mywebcommunity.org/64463953566.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426090/normal_5ffdae8c627da.pdfIn PDF document text
    • https://lebotowim.weebly.com/uploads/1/3/1/4/131438344/juxogi.pdfIn PDF document text
    • http://universe1.space/jp_morgan_quantitative_researchc1580.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464702/normal_5feddf9947e0c.pdfIn PDF document text
    • https://jubewujug.weebly.com/uploads/1/3/4/6/134653216/ce2f23.pdfIn PDF document text
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/7753878.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500887/normal_5fe285605cfdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453764/normal_5fe9de5f5c653.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_off0000dca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA6 5128 bytes
SHA-256: 0925bcc8a91796fc38aba323ebf33cd7d162e385e904cb3ae04e247fabde9b71
font_01_sfnt_off0000edfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 10172 bytes
SHA-256: 591edab9b42d19e8b0e525faa4db71f5d7f74fb824e7c9e3bcc84889a04d13c2