Malicious PDF — malware analysis report

Static analysis result for SHA-256 37cf8294e99f4c1d…

MALICIOUS

PDF

72.5 KB Created: 2021-02-20 17:38:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b411ab6266074c0cdddab80af8945b10 SHA-1: a055e16bdf915938015e0304be5881398f16d758 SHA-256: 37cf8294e99f4c1ddcf9e9b653312b7a942d1314c826b74348efc773f16d6e42
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://bologen.ru/wix?keyword=super+tank+rumble+mod+apk+unlimited+money+and+gems+2019 PDF link annotation
    • https://nivozigagu.weebly.com/uploads/1/3/4/4/134439663/aadf2f625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465149/normal_60166115d7b91.pdfIn PDF document text
    • https://cdn.sqhk.co/radageroboko/GSjhjby/51999347831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481663/normal_6014416c3f74d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500453/normal_602ed4cf5eabc.pdfIn PDF document text
    • http://scrlt.xyz/esquires_bedford_gig_guideoo3bq.pdfIn PDF document text
    • https://niraxonaweza.weebly.com/uploads/1/3/4/0/134000156/b747997.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450418/normal_5ff699b1461c7.pdfIn PDF document text
    • https://namekabesomi.weebly.com/uploads/1/3/4/6/134668803/4bcd35.pdfIn PDF document text
    • https://dipalowijoje.weebly.com/uploads/1/3/0/9/130969855/vakok.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/iB5icgj/cbse_class_9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369324/normal_5fd6c36132474.pdfIn PDF document text
    • http://olymptrade.buzz/8077199659795dza.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/mubefula/puvikozexexudujonidat.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/xevogunigodanara.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/59555069781.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/canon_eos_rebel_sl2_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/61769271369.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/holy_bible_king_james_version.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/14239934013.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_off0000dbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCC 6168 bytes
SHA-256: 53fce7f169d42a1a8de62016cd46565e4b8372f7bb3a3505079085d9f49cefe9
font_01_sfnt_off0000f0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B4 10516 bytes
SHA-256: 4bc1cbe04fb6c1acb3dd5f97062c66f770d4c08ba96301bca0e4dde2ba2de431

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