Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e47faf3b38fc7b9…

MALICIOUS

PDF

78.3 KB Created: 2021-02-17 13:57:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6f3e203dd87d37ace612d636ea418a84 SHA-1: 7965c98128203994bc87a9f361010817c0a33569 SHA-256: 0e47faf3b38fc7b9ae378c661ee702e9bb98f5cc0dcaae04c5482b2473c75b19
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://druttle.ru/wix?keyword=what+language+paris+speak PDF link annotation
    • https://maxazokal.weebly.com/uploads/1/3/1/6/131606281/nefoxexujijepi.pdfIn PDF document text
    • https://cdn.sqhk.co/robimovule/hihifhc/36453271526.pdfIn PDF document text
    • http://naturalm.space/70582941329wrirk.pdfIn PDF document text
    • http://bathforlegs.xyz/bodyboss_method_nutrition_guidealnb8.pdfIn PDF document text
    • https://dowamodugepaxa.weebly.com/uploads/1/3/0/7/130739159/zelunubovonafa.pdfIn PDF document text
    • http://securitycheckingbrowservkcom.xyz/koi_bubble_milk_tea_menuguv8t.pdfIn PDF document text
    • http://help-nanny.site/canon_raw_converter_software_free1ce5w.pdfIn PDF document text
    • http://pro-komp-master.website/modosusagazizodorejer45mgb.pdfIn PDF document text
    • https://ripapexogona.weebly.com/uploads/1/3/0/8/130874469/darenaw-sewoted.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/K3hczjg/rejebatasisojozijegavibe.pdfIn PDF document text
    • http://static-get.top/788183760251z1iy.pdfIn PDF document text
    • https://fadirepux.weebly.com/uploads/1/3/1/4/131438814/01ad5.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/lorerexeg/85452983433.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/traveling_website_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/tamil_christian_songs_lyrics_powerpoint_free.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_off0000f696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF696 5160 bytes
SHA-256: dd54dc1d5a4c9396503f7aa64c32bbc45d89da4435fd3d4831fdf68220ecf15a
font_01_sfnt_off0001082c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082C 10668 bytes
SHA-256: 3382144e16f7e7cc3bc67dbfe8b5711acd7bcb876776432f1ff98cb75d46cac4

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