Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10f05b7538214eb…

MALICIOUS

PDF

74.2 KB Created: 2021-01-20 13:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7ac2433bbfe41f33364e2df6fe26cde0 SHA-1: 81f4e692639a3bf29861194b0b6f41b518507e49 SHA-256: b10f05b7538214eb2503152fbd003394209c98d5582881b2726d345555354644
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links designed to redirect users to external websites, with one URL specifically mentioning 'wwe smackdown thunderdome tickets' as a lure. Heuristics indicate a malicious redirector and a link farm, suggesting the primary purpose is to drive traffic to potentially malicious or phishing sites. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

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 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.
  • 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://traffmen.ru/wb?keyword=wwe%20smackdown%20thunderdome%20tickets In PDF document text
    • https://site-1166610.mozfiles.com/files/1166610/person_id_tracker_app.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/3iajaic/smart_voice_recorder.pdfIn PDF document text
    • https://xevezuwojuko.weebly.com/uploads/1/3/0/7/130740392/3842220.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366969/normal_5ff71a3b30799.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494452/normal_60011e3e17e33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403413/normal_5ffc735e25004.pdfIn PDF document text
    • https://site-1171851.mozfiles.com/files/1171851/saparepamogoduzani.pdfIn PDF document text
    • https://site-1168175.mozfiles.com/files/1168175/zombie_warrior_unblocked.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/wujixus/87285906133.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/formal_dress_stores_in_atlanta.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/propiedades_del_cemento_portland.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/51828431661.pdfIn PDF document text
    • http://vezoxonu.epizy.com/kmspico_activator_for_windows_7_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/sixefasofepiwumunulip.pdfIn PDF document text
    • http://minirulo.epizy.com/elazko_philips_azur_performer_calc_clean.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_off0000e5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F1 5316 bytes
SHA-256: 9582023ccd7c1cdf34c0f4e0afbe449f366e92fd56d37634308e321f1ae8cbd8
font_01_sfnt_off0000f7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EF 10648 bytes
SHA-256: 931f6a271fcb11e4ddda4d726139cc98971f3d883d12bd5722f6edb16501fe00

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