Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7fe07af6a37c5c…

MALICIOUS

PDF

72.2 KB Created: 2021-02-09 20:53:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f7797e7e75f1b33cbc9cd966c8321026 SHA-1: 541712a0fb4e221ba9a7f9a877fb3694ed5046b9 SHA-256: 1d7fe07af6a37c5c2f9ff467e07c28241446fd9bde9abaf1b5212854658fc5ae
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=orchard+primary+school+broughton+astley+ofsted+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419626/normal_601c883e21080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375518/normal_601f5b1f0ea5e.pdfIn PDF document text
    • https://sepiximefajo.weebly.com/uploads/1/3/4/8/134849953/da5212dcdcac8.pdfIn PDF document text
    • https://dipidedi.weebly.com/uploads/1/3/2/8/132815933/naketinaguzegi_pulalolikor_jovidi_bakage.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/5ba56cb8661.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378846/normal_5ffd54a9d4cf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475874/normal_5fde2e714afc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369173/normal_5feef018ae25a.pdfIn PDF document text
    • https://noriledefokotox.weebly.com/uploads/1/3/0/7/130739853/pemum-buxumonev-votapo.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/votuweroxigezog/alif_se_mr_x_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/nusopigilijas.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/ielts_listening_sample_test.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/laviniveg.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/augmented_reality_in_education.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/think_history_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/vejakimupimag.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/2273611507.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/27050593698.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_off0000d74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74F 5836 bytes
SHA-256: 186b874935af3bb30823d5a441cb803d62a773700f28ccdb9da9afa2fb32ebf4
font_01_sfnt_off0000eb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB08 11220 bytes
SHA-256: 68d20796875c0827e9c32a003e76e040a26b12e23260feb9f99df4b82c076229

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