Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0ab421f40b3bec…

MALICIOUS

PDF

68.9 KB Created: 2021-02-25 11:53:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 56bedb8b095c14d4c1860f67ed9cdf0e SHA-1: b1cbc1e5374c17dd78d5a46c38373ed305473211 SHA-256: ff0ab421f40b3becb4a89d7b66e7080f74f091b181c42def878a41059b2087b7
126 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 0.9996

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
  • 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://jottigo.ru/123?utm_term=the+secrets+we+keep+trailer+deutsch PDF link annotation
    • http://ketrovk.xyz/vonokezovogemidutafp7n2t.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/what_is_diverse_learning_materials.pdfIn PDF document text
    • http://bilkaita.space/ridakajonunigikesofgdzkx.pdfIn PDF document text
    • https://bolojowugupi.weebly.com/uploads/1/3/4/8/134886087/fumipunajazem-tikojekafikares.pdfIn PDF document text
    • http://my-favshope.online/27074079937d8na6.pdfIn PDF document text
    • https://cdn.sqhk.co/pakebisas/fijSajj/mepezi.pdfIn PDF document text
    • http://ita-women.space/sniper_elite_1_download_pc4nl5x.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/jdd2ApF/88132121494.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/gakilelesemames.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/google_maps_earth_view_satellite_india.pdfIn PDF document text
    • http://ziwigosopijulal.mygamesonline.org/dr_zhivago_novel_characters.pdfIn PDF document text
    • https://lusenivusimutom.weebly.com/uploads/1/3/4/8/134887898/ratikuzuruwiluk.pdfIn PDF document text
    • http://souve.me/70709758219bwrc8.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/jopomodilamego/nitesupomobisinitizepilet.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/gomaf.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/disco_elysium_cuno_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/jinudapaninejejavemuneg.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_off0000d2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AA 5268 bytes
SHA-256: fa73622bc35ed6a107b2309c769f9532d9b07f64130c7ff02a9ce69e68d74c95
font_01_sfnt_off0000e49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49A 9864 bytes
SHA-256: 1c50bd473757e820d196d1fe0b3ae05c34dfd980a829438d595515aa8c234aa9

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