Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d3afb7c24fa4ad…

MALICIOUS

PDF

69.7 KB Created: 2021-03-03 07:33:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 64d99041c03146994f604009725661a6 SHA-1: d78df047bc62438e7c4e1ca1b0af951860f3037f SHA-256: 28d3afb7c24fa4adb9087a3f2afed39e73eef9e5c920a564dc504072ee684ec9
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://midufefew.ru/award?keyword=toro+power+clear+518+ze+carburetor+cleaning PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484363/normal_5fd05195ec045.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478716/normal_5fedc80dcdca9.pdfIn PDF document text
    • http://betmoy56.com/how_to_fold_and_unfold_proform_treadmilln29ke.pdfIn PDF document text
    • http://julapekawej.22web.org/best_way_to_speak_english_fluently.pdfIn PDF document text
    • http://filanion.online/78301164874rhi61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490244/normal_6008a788b2284.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410962/normal_5febb3b92c646.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368984/normal_5fe4bd90a6bfb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425912/normal_5fc95e6bbeb0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460966/normal_5fd8cb4761493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416798/normal_5fea1492e5203.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450438/normal_5fff0be53439c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384460/normal_5ff5b0850ef3a.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/luborinizu/81104473305.pdfIn PDF document text
    • http://moganip.epizy.com/7_purposes_of_punishment.pdfIn PDF document text
    • http://siduxosezuk.rf.gd/how_to_unlock_zte_z798bl_tracfone.pdfIn PDF document text
    • http://roxojibato.rf.gd/how_to_apply_waterslide_decals.pdfIn PDF document text
    • http://xaxuvep.epizy.com/button_background_color_code_in_android.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_off0000d137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD137 5524 bytes
SHA-256: d2ecf69dd11a65df2a3700ff353a84e2e38b07a7cbe06ed4e5f6fa272d19b7f2
font_01_sfnt_off0000e430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE430 10428 bytes
SHA-256: 32f8cc89749c42041614e6b78dd001b6ee0e676017afa410b750b3e189a1bcf3