Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e50eefccd90e90f…

MALICIOUS

PDF

68.6 KB Created: 2021-02-13 05:06:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6d97a642f044672663aee6b1281c2a26 SHA-1: 9e827edaa5b36de507a74eeb483f545b0e803749 SHA-256: 8e50eefccd90e90f5ca47e7ec2a1bc4ba91503829af11384129253d202ccfb0c
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=clima+juarez+hoy In PDF document text
    • https://pepadamive.weebly.com/uploads/1/3/4/4/134468065/kefuvakosozulijobed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410030/normal_5fe3b1eb2cf15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375341/normal_60092d15c9e44.pdfIn PDF document text
    • http://kartaidatodemeleri.com/jalidj08j2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382772/normal_5ff3d906371cd.pdfIn PDF document text
    • https://gosawopidelogeb.weebly.com/uploads/1/3/4/7/134714887/xumizunal.pdfIn PDF document text
    • https://tabutepapuwup.weebly.com/uploads/1/3/0/7/130740025/888509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475586/normal_5fd8400424855.pdfIn PDF document text
    • https://lefamadagizid.weebly.com/uploads/1/3/4/7/134704745/ruwemafinemade.pdfIn PDF document text
    • https://fabebebu.weebly.com/uploads/1/3/2/7/132740756/wasozozel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481406/normal_60038d616656f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zoxejotemop.rf.gd/posozazelube.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/13245851369.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/dalulutawob.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/savevudelanidi.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_off0000d14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14C 4880 bytes
SHA-256: 90eff00afbf50fcfca6c880ed7a7eeaf209c8a2b7bb804c0f6fb3671d286fb24
font_01_sfnt_off0000e1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BD 10988 bytes
SHA-256: 599b02c38a3b8005c745988761f0084042091a6feb545ab72ead55f57f0a3386

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