Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec1332a07e720b26…

MALICIOUS

PDF

1.41 MB Created: 2021-03-27 09:43:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f5d607d6d3c42f843d857f15eeb530e7 SHA-1: c1e3e160ce11923a72b94505425bd9b9de4cec7c SHA-256: ec1332a07e720b2656ceb6ad0c7789fe186415a58b1d827a26bc0642a91fc1c4
106 Risk Score

Malware Insights

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

The file is a PDF document that employs a common phishing lure, presenting itself as educational material to entice users. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' indicates that the document uses an image lure to redirect users to an SEO redirector, specifically pointing to a URL associated with free-download phishing. ClamAV detection confirms this as a 'Pdf.Phishing.Trojan'. The embedded URL is used to deliver the malicious payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0116

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://pelibifir.ru/award?keyword=grade+12+biology+textbook+mcgraw+hill+pdf PDF link annotation
    • https://cdn.sqhk.co/madumubo/ddr59ZJ/73362503074.pdfIn PDF document text
    • http://luvetev.iblogger.org/31117950888.pdfIn PDF document text
    • https://xunujilitaga.weebly.com/uploads/1/3/5/3/135315779/b7c9c.pdfIn PDF document text
    • https://cdn.sqhk.co/kadefowuvun/jXtDmgg/rajosiweloro.pdfIn PDF document text
    • https://cdn.sqhk.co/foxoxaze/hNUgjhX/twist_and_shout_sheet_music.pdfIn PDF document text
    • https://rotonozi.weebly.com/uploads/1/3/5/3/135315410/rexafovek_bipogosivadod_vukebonekatavo.pdfIn PDF document text
    • https://cdn.sqhk.co/fufeboxeri/jiB7hgf/xadidajitokuregikonotegin.pdfIn PDF document text
    • https://molawakipo.weebly.com/uploads/1/3/1/3/131379716/83e44072f87e8.pdfIn PDF document text
    • https://cdn.sqhk.co/rapekerokemo/UbQje0V/best_tuner_for_ford_6._0_powerstroke.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/eT2t3wg/niselukarubofukeritan.pdfIn PDF document text
    • https://fupigipefixoxom.weebly.com/uploads/1/3/1/3/131379213/makunupuxujot_matuzuvulebofu.pdfIn PDF document text
    • https://cdn.sqhk.co/tofigidukug/fG5gjid/15753912342.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/gupojakami/instaboost_followers_mod_apk.pdfIn PDF document text
    • http://favekagopu.epizy.com/74000469441.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/math_grade_7.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/best_crossfit_exercises_to_do_at_home.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/free_match_day_programme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/72920547033.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00160d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160D7F 6072 bytes
SHA-256: 0d4bc857b956f3bb128629ba94a7ddbb4b3ec11b1fab96c5835fdd4c847211e0
font_01_sfnt_off00162232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162232 14524 bytes
SHA-256: 19d9c19b48cc1bce07a00cfbfc1408b93986d8ab2935da65ab7481e196936824
font_02_sfnt_off00165315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165315 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61

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