Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a7f806d3968886a…

MALICIOUS

PDF

65.7 KB Created: 2021-01-23 13:42:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e6237b8f8692e70662bed694fa247a65 SHA-1: 46f48025008a0422acc9c3ee451cb001ac8b0603 SHA-256: 0a7f806d3968886a4902384ec88e740a4c04a1bf55b6b413b9dd2bc3cabe796f
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://jottigo.ru/123?utm_term=school+district+of+lancaster+teacher+contract PDF link annotation
    • https://cdn.sqhk.co/derebeduno/bhfzxii/pefagafebekibizuxaro.pdfIn PDF document text
    • https://finedogu.weebly.com/uploads/1/3/4/7/134749629/fijaxewunogid-liginun-bolipudosun-gibokuro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450889/normal_5fd124d14d83a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5fd175cd5bcec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470537/normal_5fd8bc7b85182.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486201/normal_6000d3efc17b9.pdfIn PDF document text
    • https://bumufufumobumag.weebly.com/uploads/1/3/2/8/132815806/tasagaj-jipejuxobo.pdfIn PDF document text
    • https://cdn.sqhk.co/rizakumer/apgqajb/freeze_dried_strawberries_bulk_organic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410441/normal_5fe8d24fc4b92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392439/normal_5ff45700bddc2.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/iaKOfIN/67451381860.pdfIn PDF document text
    • https://cdn.sqhk.co/renapudovi/gzKieBs/8797792958.pdfIn PDF document text
    • https://cdn.sqhk.co/jebixusugak/Vjbzrha/firabi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475725/normal_60071a1da0bca.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/gejihj0/roblox_download_chrome_os.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426953/normal_5ff0c50b799d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499299/normal_5fdbd6d7047de.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/kavifunaruvi/dividend_effect_on_balance_sheet.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_off0000c486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC486 5212 bytes
SHA-256: b0efb07021a0f3d37ff9c7b905e8a60cd17a4a8399db6465445b97963adbab41
font_01_sfnt_off0000d634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD634 10368 bytes
SHA-256: 2363b37503a38f39ff77aef8a0016814cd49191c21dc6fe661b65e4f3642310d

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