Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d829e24773ed95b…

MALICIOUS

PDF

75.7 KB Created: 2021-03-02 23:59:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ac89defc01ea04800fc53416d1aeed15 SHA-1: 07331e9a4a0e02065e91e04fad53a2292da1fe99 SHA-256: 0d829e24773ed95b5f70d4ed48c8f16d48d7773546937c86f3ba734763598dec
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content, likely for phishing or malware delivery.

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://crophysi.ru/strik?utm_term=apc+xs+1300+double+beep In PDF document text
    • http://newsportstechnology.ru/blank_brochure_templates_free_wordxgg33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414495/normal_5ffeb4f9f269b.pdfIn PDF document text
    • http://copyrighthelpptteam.com/ottoman_wars_listcd3ew.pdfIn PDF document text
    • http://mananeje.66ghz.com/gutanarususuxupilelibejer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5fd8f236d9298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481285/normal_603b5e868a82b.pdfIn PDF document text
    • http://redpandarecycling.com/nexevazikaseserakosmofzv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445115/normal_6031bafb3a1f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370097/normal_5fc759eba4b7e.pdfIn PDF document text
    • http://timinome.getenjoyment.net/puxifazadetelojavub.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/nediwozarotokenera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480382/normal_6020b653ea8da.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/javascript_absolute_position_of_element.pdfIn PDF document text
    • http://nusowutevu.getenjoyment.net/sujunakor.pdfIn PDF document text
    • http://tebipadize.iblogger.org/cannot_login_to_vsphere_web_client.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479675/normal_5ff1ebf012364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427093/normal_600b761b48fa0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xisuferixap.epizy.com/73978496534.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/katilojipetakujiwulak.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/cant_stop_wont_stop_foundation_swatches.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/tamil_movie_songs_2016.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_off0000eb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6B 5316 bytes
SHA-256: 1370dc6fad659071c4f50f4584547d089ff8c047d8b35239f2568469bc0e35fc
font_01_sfnt_off0000fd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9F 10516 bytes
SHA-256: 00a75138ae591eb3b250117313bd8f15397424727047cbe2a92f7f286b9872f9

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