Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb6475ffa7319bf…

MALICIOUS

PDF

76.3 KB Created: 2021-05-05 10:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5e80a29dc49e992a4305a930f2924581 SHA-1: 932462ae75aaee1c7a3ef8c1382612171d52b416 SHA-256: 9eb6475ffa7319bf63ba04fd8678db3aed3c6af6e25005b4d2b0a8f969f476ed
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with several pointing to known malicious redirectors and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=lost+in+yonkers+cast In PDF document text
    • https://vigijamavo.weebly.com/uploads/1/3/0/9/130968937/bofetibi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386613/normal_602305863b4fc.pdfIn PDF document text
    • http://vnds-v.website/xafiza1tihp.pdfIn PDF document text
    • https://jerupixudenaxi.weebly.com/uploads/1/3/1/4/131437293/xazimakam-memunikovo-golodamo-mukesexibito.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/what_are_the_questions_asked_in_desktop_support_interview.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416316/normal_5fccb54ea763f.pdfIn PDF document text
    • http://doordash.link/76134259764gucmv.pdfIn PDF document text
    • https://nazizuvadonilu.weebly.com/uploads/1/3/4/5/134590702/mirigiwameb.pdfIn PDF document text
    • http://fruit-citrus.space/wumuginosezizudusluxou.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446491/normal_6004db092a741.pdfIn PDF document text
    • http://wgathering.org/nagefoxc8lv3.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/new_business_ideas_in_telugu.pdfIn PDF document text
    • https://sobiwololisa.weebly.com/uploads/1/3/0/9/130969717/5ca0a25000.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7494cff-4140-45e2-8e0f-34f73803667d/how_often_does_google_maps_update_their_street_view.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a79bf303-2c3d-48c0-8a8d-ad00ed74b4d8/62288481229.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/facebook_status_punjabi_song.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/oster_a5_turbo_clipper_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72003fc6-00fd-4dae-b97e-21548c79210e/what_word_describes_rise_and_fall.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_off0000edee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEE 4868 bytes
SHA-256: dc8738c922ff9ee79eff2ab9c0568d7a5d2e36fcb2e9416b7063bc2eb6714443
font_01_sfnt_off0000fe9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9B 10936 bytes
SHA-256: 31dc4a5739137568fe9c92e1ebc49e3121664e32526f3376591ceacf01927ce0

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