Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ba715d2f8325d3…

MALICIOUS

PDF

73.0 KB Created: 2021-04-09 19:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d0ffe73e8c79f4a74fe175fe70f90889 SHA-1: 55afde976f04bb58726fd5fba04c579e14909b10 SHA-256: 78ba715d2f8325d3e9b99b46dcf14e033e0341230ffb5afb9ef78be0200c1772
134 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the presence of external URIs and the heuristic findings suggest the document's purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://resalured.ru/strik?utm_term=how+to+contact+brandon+sanderson PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448100/normal_6009f7ba58e29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418556/normal_601bd1cc06202.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7a48fde5-f9d1-4ce4-84a2-8b156d245d18.filesusr.com/ugd/8127dd_65e8e84726d9440b8a096c4a8dcf855e.pdf?index=trueIn PDF document text
    • http://sisumosunozudot.epizy.com/coloring_pages_animals.pdfIn PDF document text
    • http://vofofoduwegakuv.rf.gd/62046416509.pdfIn PDF document text
    • https://5f384421-c3d0-4b4c-85a6-d3745974446f.filesusr.com/ugd/40006b_80deed151f7046b7af8e44c365fe47e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vokeri/17196980005.pdfIn PDF document text
    • http://weverikovufom.rf.gd/waste_to_energy_technologies_and_global_applications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1fea017-fd09-48df-983d-e1dfbd0899e2/11996836841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fbe55be-e4c1-47e6-b37d-a38ec9daada3/69538288678.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/5655650657.pdfIn PDF document text
    • http://romipozaxijida.rf.gd/70486877074.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/how_to_find_unit_cell.pdfIn PDF document text
    • https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_e9ca7fc4664b4196a27d3ca60adb2faa.pdf?index=trueIn PDF document text
    • http://puvusevakap.epizy.com/super_nintendo_emulator_iphone.pdfIn PDF document text
    • http://xemalulixa.rf.gd/my_kindle_is_not_charging_fully.pdfIn PDF document text
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_3eec7704c20049e0a4de0ed6a6872e37.pdf?index=trueIn PDF document text
    • http://zelubosomud.rf.gd/verizon_fios_router_red_light.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_off0000de7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7E 5092 bytes
SHA-256: 943c952c46c595546f5c539cf3d97dcb06876264cd62d22a5df86d3358eb6f69
font_01_sfnt_off0000efe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE6 11032 bytes
SHA-256: ea78e155f8337d4f474bb44ea387a35bdae0ec3696dce8fac804f6ff35a730ba

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