Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d98e0b01bb4b867…

MALICIOUS

PDF

64.2 KB Created: 2020-12-18 07:58:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d0a25fa5e97cf871730d194926099735 SHA-1: 8a5403dd6f4d5a57a61d3cf7b5c402dda393698b SHA-256: 0d98e0b01bb4b86736df229c04dc8ff229a06612b63e25eceb8dc0c4e3b542f5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to direct users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a malicious document, possibly leveraging embedded JavaScript for redirection.

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
  • 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.
  • 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://trafffi.ru/strik?utm_term=watchman+nee+spiritual+authority PDF link annotation
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/f22a81f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_5fd7051327112.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/sakitivezilike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379719/normal_5f93eb337aef5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393364/normal_5f922fd8860fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe091d3570fb44d1ca4b76/1606289698517/azithromycin_500mg_for_sinus_infection.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcff4ac7afe470b556d2be/1606221643336/xurejevurajad.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5491a403f5353fdb28df9/t/5fcea812c463130800a3b8eb/1607378963535/free_live_wallpaper_for_iphone_7_plus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e77986d5-6b14-4b84-9f6b-ddfe1d8d93f3/moxalelevu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3175ae2fce462bc9a424b/t/5fc538b061e25426e1e15fc6/1606760626751/62531621043.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b3906b97992eb5678c6c/t/5fc54b8618e72e5fdb86a6bc/1606765447555/22028268084.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcea2d8151d800803c174b8/t/5fd63d16e5ac5828961d3831/1607875865380/67297940610.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4b22f8cdb769c6d8e8be/1606372130452/road_of_the_dead_unblocked_games_77.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_off0000bebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEBD 5288 bytes
SHA-256: 649311ba56333e5f959b7cf9524ef8d2558650c88b35286c892f497c4aa194c8
font_01_sfnt_off0000d0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A1 10316 bytes
SHA-256: f01f97316a0e25bb70a4fa4c66c3932b77eae6eda6f697767cb244e3ed9e4076

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