Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c17d68d0440d9d8…

MALICIOUS

PDF

84.8 KB Created: 2021-04-05 23:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 061220f95d1756d2c921c726ca3eecac SHA-1: cb166979f43adc2a7331e4f118940f10f0fa074d SHA-256: 7c17d68d0440d9d83dd31013960bb64120c2baa8d666c9a1429c92d2d102dcb0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9994

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://xezojetit.ru/strik?utm_term=charter+communications+remote+codes+for+samsung PDF link annotation
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://netulomite.weebly.com/uploads/1/3/2/8/132814473/87d60f.pdfIn PDF document text
    • http://molipetofokeva.22web.org/java_version_8_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449178/normal_603101c1cc5d6.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/nofurugipekepo.pdfIn PDF document text
    • https://cdn.sqhk.co/bikakigiben/Jgejejj/doomer_guy_and_girl.pdfIn PDF document text
    • http://apparently-home.com/72783626508z059i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412588/normal_6042088816d58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_603570f78edfe.pdfIn PDF document text
    • https://niregesop.weebly.com/uploads/1/3/0/7/130776037/1770191.pdfIn PDF document text
    • http://docita.fun/37340973363h12o1.pdfIn PDF document text
    • https://jifofavara.weebly.com/uploads/1/3/4/6/134631997/serizowe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490250/normal_6032be976af8d.pdfIn PDF document text
    • http://goloszauniver.fun/62018879666zie5y.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/HUhiQge/glory_of_generals_pacific_war.pdfIn PDF document text
    • http://lotukaguw.sportsontheweb.net/47288446503.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/G9ginhd/65158962409.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/jfpdjj6/radiation_city_apk_obb_free_download.pdfIn PDF document text
    • http://xifogoweru.22web.org/43677423447.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://baxujaxifibew.rf.gd/guvesa.pdfIn PDF document text
    • http://mutodavop.rf.gd/63800374039.pdfIn PDF document text
    • http://gegilifopom.myartsonline.com/32108402542.pdfIn PDF document text
    • http://zonurupadul.atwebpages.com/67873813811.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_off00010ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECD 5308 bytes
SHA-256: 635459be57f99445eae5b27e3e8f62153c67ef4e9d0451dcfe7724703f011b7d
font_01_sfnt_off000120af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AF 10844 bytes
SHA-256: 88f9067bed5d9d1e4cfeca18bdbf53e1ccd7617b2d0bac15322ec69023da3221

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