Malicious PDF — malware analysis report

Static analysis result for SHA-256 59adea2be5f258ed…

MALICIOUS

PDF

80.6 KB Created: 2021-01-21 10:42:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 765ae9b36b77569452e306d78ea05723 SHA-1: 15dd46c02c24c7cecd660d0d5755efd6c660e7e9 SHA-256: 59adea2be5f258eddddadbe3de1a24ab8bc8ad598e224dd22dcd6bdfc122f926
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector infrastructure. The heuristic firings indicate the PDF is designed as a link farm on disposable hosting, likely to phish for information or redirect to further malicious content. Although no scripts were extracted, the presence of malicious links and the ML classifier's high confidence suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=johnson+county+ks+court+records In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5f9ee6139ad7c.pdfIn PDF document text
    • https://cdn.sqhk.co/sunalikefazo/XYjbgj5/gadejobixuvowamezusivijik.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/SjfhiiL/environmental_studies_definition_scope_and_importance.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_5faf9246d9e17.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/jgxkrgj/sijemiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402504/normal_5fd5f3644d1d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404725/normal_5fe2d2a57e900.pdfIn PDF document text
    • https://site-1192597.mozfiles.com/files/1192597/lasizifobofum.pdfIn PDF document text
    • https://site-1245011.mozfiles.com/files/1245011/sizotuvemebizixitizesuke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408476/normal_5fe6ef3aa4e89.pdfIn PDF document text
    • https://site-1175763.mozfiles.com/files/1175763/42447415544.pdfIn PDF document text
    • https://site-1167964.mozfiles.com/files/1167964/pokemon_fire_red_prima_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392207/normal_5fd843f117555.pdfIn PDF document text
    • https://site-1176903.mozfiles.com/files/1176903/ckd_guideline_malaysia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477626/normal_5ffa25f1d587b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_5f8fe05dab701.pdfIn PDF document text
    • https://site-1249145.mozfiles.com/files/1249145/fekaluvokebasijewokol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xefivaz.epizy.com/56238572406.pdfIn PDF document text
    • http://butexageteril.rf.gd/38008288030.pdfIn PDF document text
    • http://reditavipesef.rf.gd/cortana_apk_mod.pdfIn PDF document text
    • http://kudurefusi.epizy.com/wokoxawugoxefawabofam.pdfIn PDF document text
    • http://vejimugar.epizy.com/spring_cloud_tutorial.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_off0000fd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4A 4940 bytes
SHA-256: e30c286226dd67d8a58f2e04c1e5c6fa1f26e5b07aad8d649912386235f1ff87
font_01_sfnt_off00010e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E17 11372 bytes
SHA-256: 2910695e1765349df79b4cbdaa6096659bade08e168795328fac621bfb314113

Open this report in the interactive analyzer, or submit your own file for analysis.