Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b03ec133ea158a7…

MALICIOUS

PDF

202.6 KB Created: 2021-04-23 13:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 12e6e4a2a0d55027aa2a23d0f6180c09 SHA-1: 90042aaaa111756b91d3607ea4c6e993ade37450 SHA-256: 6b03ec133ea158a7b72b89dd708c4e24cc1d6184410782f9e56b440f2d80d103
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL, 'https://dafemum.ru/strik?utm_term=steins+gate+0+episode+9+explained', is the primary indicator of malicious intent. The ML classifier and ClamAV detection further support the malicious classification. No scripts were extracted, but the document's structure and embedded URL strongly suggest a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 4

  • 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.
  • 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://dafemum.ru/strik?utm_term=steins+gate+0+episode+9+explained In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403807/normal_5fd835a9e2f35.pdfIn PDF document text
    • https://cdn.sqhk.co/gizimonuzubi/uihjev0/9651245873.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487197/normal_5fd706db900d2.pdfIn PDF document text
    • https://vatikaleme.weebly.com/uploads/1/3/5/3/135386674/30db8.pdfIn PDF document text
    • https://cdn.sqhk.co/baxewoxevum/NFFgrhf/72001368869.pdfIn PDF document text
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/nukewifinuwu.pdfIn PDF document text
    • https://duvutotan.weebly.com/uploads/1/3/0/7/130775700/pokimuvagoso.pdfIn PDF document text
    • https://cdn.sqhk.co/givikofuf/gcXOpzS/45057945058.pdfIn PDF document text
    • https://cdn.sqhk.co/juzexokogim/hg7hbjb/57622180087.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375908/normal_5fe4d318497b1.pdfIn PDF document text
    • https://cdn.sqhk.co/penavagalo/gjYgce4/11573085445.pdfIn PDF document text
    • https://cdn.sqhk.co/kinerufi/oR3OIXn/new_cg_song_2018_dj_remix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_605c34067983b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412181/normal_6012443d894a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380076/normal_6041a8584c81a.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/c0jhcib/cartoon_dog_and_cartoon_cat_pictures.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/776477d2-ab64-4ec5-bfa4-5552944240a5/23103175928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a6f163b-de3a-44c0-ab26-60257ff85e51/autodesk_autocad_software_free_trial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd321f11-f436-4250-8509-086029240aef/john_deere_a_tractor_plowing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/632e442b-95b3-464d-820c-728d3a7e280a/black__decker_gh900_review.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_off0002ddb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDB3 5500 bytes
SHA-256: 02efc4d5684fdb9fcf2727fb573073312af2809c80f924e88e1787c7c3574da8
font_01_sfnt_off0002f078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F078 12912 bytes
SHA-256: 2a21fc22f11b5021204096be57539a8522cf2bcc111ac2d84824127b63e436f2

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