Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abd304276b6de71…

MALICIOUS

PDF

71.9 KB Created: 2021-02-21 17:09:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b4c17a9b3c93a4ccedb38adf3da01bb2 SHA-1: f7b6688f4e2887f2af169a866e3f8f7f25dd36ac SHA-256: 8abd304276b6de71928731ef39f1c8694a0ad96b9aed9ea847ae7df0a81d45d5
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/wb?keyword=can%20i%20learn%20tableau%20in%20a%20day PDF link annotation
    • http://zubiki.top/illustrated_manuscript_of_the_lotus_sutrark47d.pdfIn PDF document text
    • https://kiwakobomu.weebly.com/uploads/1/3/1/4/131482833/6797470.pdfIn PDF document text
    • https://fipuzogafugigen.weebly.com/uploads/1/3/4/1/134108551/bofamijigejisidit.pdfIn PDF document text
    • http://khanapoorti.com/tizovojizou6bxb.pdfIn PDF document text
    • http://theandyhong.com/tidire53eh3.pdfIn PDF document text
    • https://cdn.sqhk.co/favejofu/7jiicjf/gupamat.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxikinanibu/MPDBzii/saxusazafitube.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/gh9qhfo/rug_steam_cleaner_rental_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/jdRI4gh/domefamijani.pdfIn PDF document text
    • https://cdn.sqhk.co/fisoxinizo/agee0ih/vabebumibave.pdfIn PDF document text
    • http://qunit.space/lavafogiqznkf.pdfIn PDF document text
    • https://cdn.sqhk.co/ratufewebu/jbvjdia/free_your_heart_apparel_returns.pdfIn PDF document text
    • https://cdn.sqhk.co/nobukomorur/hDNiahX/64056129377.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/jjQxZhb/42291913619.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/dojivewobasuval/71531052639.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_off0000de03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE03 4788 bytes
SHA-256: 6d64172cf860ebb9f19b8395a0c9ae0e404f2aa97c390fad40471a7eac212c17
font_01_sfnt_off0000ee56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE56 10772 bytes
SHA-256: 42acd8266f2db36aa532c3f2b77f95ab8a54e1eca3afcb5995db2c8e83c153f0

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