Malicious PDF — malware analysis report

Static analysis result for SHA-256 99fbda8b8e9123c5…

MALICIOUS

PDF

86.3 KB Created: 2021-02-02 12:51:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dbf8697694709642281587efb54d7f8a SHA-1: c2f4812d532cae08a74338fa25037c3037a57357 SHA-256: 99fbda8b8e9123c5c123d25b74f5aa58b899a45662b92a0d2045e848e9ab16c2
194 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=witcher+3+gwent+guide In PDF document text
    • http://adyga.site/4223017658781y0t.pdfIn PDF document text
    • http://copalofa.site/358999781317qm9a.pdfIn PDF document text
    • http://copyright-security-ig.com/76784610007azje.pdfIn PDF document text
    • http://slamelina.website/carrom_disc_pool_mod_apk_revdlo1o92.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/kitakilesa/63454057407.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/bujifopixurasu.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/gifizekuwurom.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/google_play_store_apps_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/xigubikavetafurapubumujin.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/chhota_bheem_video_tamil_song.pdfIn PDF document text
    • http://fawivemepogu.epizy.com/apparel_production_planning_and_control.pdfIn PDF document text
    • http://kekerojuxofex.epizy.com/dazafotutudimojo.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/mathematics_dictionary_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/lidorojenabebakekizadadew.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/fenadabezowovi.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_off0001167e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167E 5048 bytes
SHA-256: b10e6e5dcb53b11a0f4dc60272f4c350a055b4b74b3dfd1941bf88bc4418f002
font_01_sfnt_off000127c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C0 10816 bytes
SHA-256: eaa71322f4d181b329419b5b14cfdaed49ee24fe4a92e36af2949aed7fb6cdcf