Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd97123be3bfe4c…

MALICIOUS

PDF

78.2 KB Created: 2021-03-19 06:00:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ccbd84cce8d629382ce587a919ed3d12 SHA-1: a171903771207743132f1a25c9a85c091fd30b0c SHA-256: 5fd97123be3bfe4c80d8782a10a591d5b2dc92dbc9e67811d5954080c4984fd5
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document uses a lure related to employee resignation to trick the user into interacting with a malicious link. The heuristic PDF_SEO_UTM_REDIRECTOR_LINK indicates this is a phishing attempt using an SEO redirector. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://gimoguvi.ru/123?utm_term=employee+resignation+acceptance+letter+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416490/normal_602c2a2367e81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_6035a884b4e53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445743/normal_6007d2a18e22f.pdfIn PDF document text
    • http://dawezedelofeda.scienceontheweb.net/wiwipore.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443576/normal_5ffe567840ca5.pdfIn PDF document text
    • http://setopin.mypressonline.com/79018709728.pdfIn PDF document text
    • http://lexaxak.mywebcommunity.org/fifadenivuxivukiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496597/normal_5fc93a1a69f36.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/what_is_the_best_side_by_side_utv_for_the_money.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/feragedujopugugivotaso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481069/normal_60293677d9a91.pdfIn PDF document text
    • http://morasuxod.getenjoyment.net/43389863800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452193/normal_5fe98c1de3d92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_6027d97084712.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/percy_jackson_greek_gods_ar_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415525/normal_5fee41c2410d4.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/xokebore/maryland_boating_course_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/canon_canoscan_9000f_mark_ii_software.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/bornoporichoy_1.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/brahmani_mata_hd_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/my_son_the_fanatic_analysis_point_of_view.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/pilunurizipodezofimuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/nexozufesipafizigapiwam.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/creative_cloud_free_full_version.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36A 5312 bytes
SHA-256: 7dec83b384d7105f4661642e52085572125d45b2be25ccaefd4bd55ee2598925
font_01_sfnt_off00010571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10571 10332 bytes
SHA-256: 69b94703893085f52e207505dd1f54e61a0e03d028a6a735fdef8c98e6f742f8

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