Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac05f2622bbfe04…

MALICIOUS

PDF

70.6 KB Created: 2021-02-25 18:17:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a714c437368db727561be1181ac558d9 SHA-1: 42f6825e68ae1cd4dcc2713b1da2bdd9b2eb4099 SHA-256: dac05f2622bbfe04c726034cdcf50eb441497968b0ea29e69e7f0e89c4c5e4cf
144 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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/aws?utm_term=typography+shirt+design+template PDF link annotation
    • http://modutomipofa.iblogger.org/love_couple_hd_photos_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480899/normal_5fdb2183585da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426697/normal_5ffe490f640f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426072/normal_60247840d6f8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451970/normal_602c01b6df3ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_60219dbd1c954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469106/normal_6022f9b1ba8f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5fdbc7aec169e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484143/normal_5ff868638397a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kojomazudogog.epizy.com/camera_fv-_5_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/dotixirepapa.pdfIn PDF document text
    • http://poramukuwulaji.epizy.com/xipegilinafuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/cracking_the_sat_premium_2019_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/97114294038.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/liberia_country_risk_report.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_off0000d7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BC 5424 bytes
SHA-256: 791798d9d1b69432aeae2f6066f8795bc00ec9d38c8abd49f0f4deb00ce57d48
font_01_sfnt_off0000ea0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0C 10508 bytes
SHA-256: 1dbec754d7af9ef2f7bf2cace76107fc0242cb5f91d9f34f0cef8536ca532cf1