Malicious PDF — malware analysis report

Static analysis result for SHA-256 28af2c1fe30ab185…

MALICIOUS

PDF

74.5 KB Created: 2021-02-25 14:26:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e915b8fd093154a1ea84dc44fdee8abd SHA-1: 23f11d578973653537a0e00f54d0fb38e27a73ba SHA-256: 28af2c1fe30ab1856a47d09aa2d5ca1cf4efa9294d40b7c53add69e9acc31d97
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=child+care+staff+roster+template PDF link annotation
    • http://littlenat.space/12997678142vt7xr.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinipaz/tHCfgch/clash_royale_clan_wars_2_defense_decks.pdfIn PDF document text
    • https://xajixaze.weebly.com/uploads/1/3/2/3/132302973/561358.pdfIn PDF document text
    • https://jinidodax.weebly.com/uploads/1/3/0/9/130969434/wemavo.pdfIn PDF document text
    • https://zuxadozi.weebly.com/uploads/1/3/4/6/134662888/nazojido.pdfIn PDF document text
    • https://cdn.sqhk.co/mivijigonof/AhfPgKx/70285186965.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/3078085.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/kakogapavagoniwolebunanen.pdfIn PDF document text
    • https://samaruwopag.weebly.com/uploads/1/3/0/7/130738554/8256550.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/jfZiMih/33230399890.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/fadedosi/zutoz.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/3_basic_physics_equations.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/92320336960.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/sodiregog.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/nodetufogabidepuboxoxuzus.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_off0000e663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE663 5300 bytes
SHA-256: c5cc7fe77904a4e3b3bee2eb8ca432031180b889794ff9ad9621fdce851504ca
font_01_sfnt_off0000f836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF836 10896 bytes
SHA-256: 652b7e190969e422cf54a3ceb16708f7016c17efbe3281f54d58edc846ac27dc