Malicious PDF — malware analysis report

Static analysis result for SHA-256 588050bfd42645c1…

MALICIOUS

PDF

74.9 KB Created: 2021-01-24 11:55:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: eb29d637a41a828a563d49248d074ee3 SHA-1: 9d6e48e761090e8415330249f0f34158d0688b19 SHA-256: 588050bfd42645c12e65f0dfdceda78a67ac69654c4319bb1d5c7ba1b1aeab11
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://bologen.ru/wb?keyword=acrylic%20nails%20designs%20ideas PDF link annotation
    • https://waneratamif.weebly.com/uploads/1/3/1/4/131436972/3330972.pdfIn PDF document text
    • https://dawoxojukuput.weebly.com/uploads/1/3/4/8/134890950/kofusananoro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376854/normal_5fdbd31242ab7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465930/normal_5ff50ad723021.pdfIn PDF document text
    • https://fiwibafufo.weebly.com/uploads/1/3/0/7/130774969/14b24e3.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/4482688.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391037/normal_5fcbe7a2b846a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371003/normal_5ff77161981dd.pdfIn PDF document text
    • https://gafapelisepofas.weebly.com/uploads/1/3/4/7/134762307/d69685e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405190/normal_5ff677fe17e25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_5fdc35f484baf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393044/normal_6008dd4338fad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465259/normal_600bf5e906095.pdfIn PDF document text
    • https://fikuzafunowu.weebly.com/uploads/1/3/1/8/131857523/zuloxokas_durul_fadisuja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495526/normal_5fe4a8f673f86.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_off0000e7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B2 5200 bytes
SHA-256: e7da15b7a58f8feb0c472d699da4a3cec89dd46bd9741b6861c8fb84491f99ae
font_01_sfnt_off0000f979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF979 11012 bytes
SHA-256: 92a8a21394da13f1829305f6a519750519795d62949932d63b0cba0a198927c3