Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc42e7a428eb9db7…

MALICIOUS

PDF

66.1 KB Created: 2021-02-15 16:42:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 763a18737a9ca5814587fcebd278593a SHA-1: 5ce38562659a8f324ce04c2e8f1e22778bf3350e SHA-256: cc42e7a428eb9db7ec706bbf0a23b83563288bb79de98ff1a6257fa616f0eb5a
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://maypoin.ru/wb?keyword=mac%203200%20chainsaw%20parts%20near%20me PDF link annotation
    • http://bepevekebezupu.22web.org/chrome_offline_setup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368479/normal_601dd5f249e09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471706/normal_5fec09aeeec3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462974/normal_601b907c995c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460228/normal_5ff2dcfdedfc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382196/normal_5ff55a51627a7.pdfIn PDF document text
    • http://vafakewa.iblogger.org/bengali_movie_2008_mp4_aamir_pratigya.pdfIn PDF document text
    • https://zajuzuvo.weebly.com/uploads/1/3/4/4/134474050/8916709.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/wusigipufuvowix/hyrule_warriors_weapon_farming_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/saxon_math_geometry_test_answers.pdfIn PDF document text
    • http://gituloropo.rf.gd/sepokekune.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/41893775301.pdfIn PDF document text
    • http://kosener.epizy.com/font_arabic_app.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/kelly_galloup_slide_inn_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/conditions_precedent_clause_template.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_off0000c6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A4 5676 bytes
SHA-256: 272d27b69b99d4add0133544f6ef74f985c0fe6eb200316d892671b03bb0296e
font_01_sfnt_off0000d9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E3 9896 bytes
SHA-256: 303d0f456aa93dff02ee8d66ab39c585fbce070888c0f0e4f34de8880cc6a375