Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed19d1b02c91ed2…

MALICIOUS

PDF

72.2 KB Created: 2021-02-16 03:48:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ad362763050614f1ba10bf55098c077c SHA-1: 50eb22f0b1d7487e3a8df73ee1e22495d13e24f4 SHA-256: 4ed19d1b02c91ed2f8d1f2b607c3233764b6d053eb1f82141fef1e0fe487c84d
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://druttle.ru/wix?keyword=gse+ss8h6+study+guide+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383136/normal_601c9df54ec36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401525/normal_600bbd53cda88.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/g9hfjb1/losofojukad.pdfIn PDF document text
    • https://xuxukogizi.weebly.com/uploads/1/3/5/3/135320654/tuteri_diponodegavoka_romegukup_sewutebutosolul.pdfIn PDF document text
    • https://mezemefi.weebly.com/uploads/1/3/1/3/131384279/7714517.pdfIn PDF document text
    • http://dasopifumos.iblogger.org/calculating_volume_and_density_worksheets.pdfIn PDF document text
    • https://jipukikibowema.weebly.com/uploads/1/3/4/6/134633032/wujidefarik_delabo_jijunadupajeg_paxojub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449172/normal_6007c29691541.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/7Rjgzjc/start_em_sit_em_kickers_week_5.pdfIn PDF document text
    • https://cdn.sqhk.co/gujurolekuma/gjjiacc/46839801438.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/sixolose/alternative_investment_funds_sebi.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/vomezarava.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/69637395998.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/70585126712.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/76275939277.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/rulelupolaboxewasuxup.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/wafudexanedemevurifevo.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_off0000dc7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7B 5692 bytes
SHA-256: b4ff26b2b1b1531b72b87e5044020647eaa5ec9df64363b6f4849b0515128b26
font_01_sfnt_off0000efed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFED 10620 bytes
SHA-256: d40fcc3ee01bd17ab614da98014f463d43410088175a0d2ea0a9db15c969773b

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