Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa70b519c8f6054…

MALICIOUS

PDF

68.8 KB Created: 2021-01-23 22:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0234d3ffed701aab4113f4b7729d7380 SHA-1: 7f8ba7c3d5ef376ee4a6446e8e9ac4da7ea6c694 SHA-256: 9aa70b519c8f60549bdd82a04a5ebd8352d023bfdcf96a7b75dc4fc9fb2d2b3e
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to disposable domains, flagged as a link farm and a malicious redirector. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are consistent with a malicious document designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://traffmen.ru/123?utm_term=law+of+sines+worksheet+rpdp+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450250/normal_5fd10221284fc.pdfIn PDF document text
    • http://momijuluxesapek.iblogger.org/august_alsina_testimony_zip_file.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383692/normal_5feff966c1857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416500/normal_5fe92966dad7e.pdfIn PDF document text
    • https://site-1243523.mozfiles.com/files/1243523/roll20_dnd_character_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/ABhhhgO/racing_go_kart_frame_plans.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://liboditi.rf.gd/preeclampsia_guidelines_2018_acog.pdfIn PDF document text
    • http://zonadomafi.rf.gd/excel_2013_indirect_function_another_sheet.pdfIn PDF document text
    • http://vatimofaxemog.rf.gd/materialismo_e_idealismo_filosofico.pdfIn PDF document text
    • http://wivowutone.epizy.com/vivo_v5_android_version_7._0_update.pdfIn PDF document text
    • http://kunipotow.epizy.com/autocad_2013_32_bit_keygen_free.pdfIn PDF document text
    • http://warepeg.rf.gd/biometric_and_fingerprint_payment_technology_ppt.pdfIn PDF document text
    • http://rozazidugo.epizy.com/lettering_composition_templates_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC500 4980 bytes
SHA-256: 127863a212164f81f840187671776fb13d5d71eee5c9d18cf617a2ab5a9736b3
font_01_sfnt_off0000d5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F7 9912 bytes
SHA-256: 8fc83d849f235cebeca4c826bdbb117f2aa59b0e1150b63c9670486f4051f5fd
font_02_sfnt_off0000f7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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