Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c0f7d3a5738dde…

MALICIOUS

PDF

73.7 KB Created: 2021-01-25 20:32:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 772c6d9a4037cdde445344ddac87818e SHA-1: 6f3c9f7c0f726f54f0d8a0f3fbcec04379957727 SHA-256: d3c0f7d3a5738dde893d7c2916cdbdff8187af29628338aaa05ca382804a3a21
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://seumenha.ru/aws?utm_term=very+tough+puzzles+with+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470960/normal_5fe82937c127f.pdfIn PDF document text
    • https://mesasijodise.weebly.com/uploads/1/3/5/3/135315214/nigofub_fuvatukavazib_nanebobifiw.pdfIn PDF document text
    • https://kitawusew.weebly.com/uploads/1/3/4/2/134234725/subaponituxe-segigovajo-keguwesojelavok-jososoz.pdfIn PDF document text
    • https://wotowabe.weebly.com/uploads/1/3/4/6/134688823/53583446d22e7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451023/normal_60081675426b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368503/normal_5ffe0f95f3ba7.pdfIn PDF document text
    • https://rixagaxovexi.weebly.com/uploads/1/3/4/0/134000332/revuxup.pdfIn PDF document text
    • https://lupunudarowujak.weebly.com/uploads/1/3/4/5/134599946/8317273.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459939/normal_5ffea944b9ba5.pdfIn PDF document text
    • https://denutuzuno.weebly.com/uploads/1/3/4/7/134706868/zasowegodosifamok.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/ponivotigegepub/55472330693.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/aashto_code.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/description_text_structure_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/introduction_email_to_colleagues_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/lauderdale_county_arrests_reports.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_off0000e362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE362 5292 bytes
SHA-256: 4d471e4fec1c11ecefaccf3540de6eb9c22ce07feb70c9b7a4e71f4c32cb3037
font_01_sfnt_off0000f583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF583 10720 bytes
SHA-256: ad2944bedf58a09d78b5fd5b5aadb321a80b96cdd0b3a7a22ed468e863ccdcfc

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