Malicious PDF — malware analysis report

Static analysis result for SHA-256 303456fb50e732c8…

MALICIOUS

PDF

81.8 KB Created: 2020-11-19 22:34:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: cc65574ea18f79f50736804751754353 SHA-1: d0919efc323bae679479bf320afbab7b68d7fb34 SHA-256: 303456fb50e732c8eb29c1db36562090ec7f696212439c4500470b430141ff13
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafftec.ru/strik?utm_term=chasing+vermeer+study+guide+answers PDF link annotation
    • https://gugabezari.weebly.com/uploads/1/3/4/5/134577353/0c5fbc8a3e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2452ea05-9471-40a7-9f26-dfddb6657328/30890260934.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/jama_2012_ards_berlin_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/773c9352-52c6-4935-80f1-931659e671d4/69332233811.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/download_three_6_mafia_most_known_unknown_zip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7be3787c-3e34-4ff4-b737-78dfa144558d/koveduv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4d048d-131a-435f-b4e8-c7e78ed30ae6/83631025381.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/accident_report_format_in_construction_site.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/diabetes_mellitus_tipo_2_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/80818760190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b7eb68a-fb1e-4811-a276-b3d1d20672c1/plan_de_salvacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17270f62-fa44-43ce-bbba-ee1eebea9fe7/wedonepipufevonef.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/pokemon_ash_gray_download_gba_rom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a60aae-0b11-491b-9498-4f7b30caafea/femenutaruwufetafelanifav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/391ce779-72f6-4e11-b593-cc33e1e325f1/11709715183.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/xipuvefavigomapej.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_off0001014d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014D 5364 bytes
SHA-256: 2673c7ac356f65363ed29f41ca1d249e0943a152ada7e01a2c10d8c3f5dbf6f1
font_01_sfnt_off00011373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11373 11176 bytes
SHA-256: 0a6503230f48452cb718ae030f789d3879c3d209dc1a54e6fd75de01bf0e2dac