Malicious PDF — malware analysis report

Static analysis result for SHA-256 6efb9fecbbac38e2…

MALICIOUS

PDF

69.1 KB Created: 2020-12-16 15:39:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 978b8fc0a7316ab7b0c493a078740459 SHA-1: 20c4680b6953173a0e67360ee9b5e8930a009989 SHA-256: 6efb9fecbbac38e2f720df8c936371ad14039995e71420c8b928d2695e232226
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a critical heuristic firing for ClamAV detection. An external URI heuristic points to a suspicious URL, 'https://traffnew.ru/123?utm_term=progressive+republican+party+turkey', which is likely used for phishing or to download a secondary payload. Although no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?utm_term=progressive+republican+party+turkey PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/60566147395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb7ce76-ad4c-46f9-846e-f24940e0b3e0/37260419497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1dbae92-6b7e-4282-8843-31311a66b926/jotabilogitopadibow.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/free_axure_rp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f218d97-06e4-4c3b-ba7c-3f61c62e6970/18839586731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f71ac81-699e-4551-9b74-b5b9443e9f62/difference_between_qualitative_and_quantitative_research_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eafeb286-f37d-4ecd-9fb0-edde6f2e2afe/fat_barbie_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64604f2b-a1c5-4dd9-8545-7b6d5e77b8f9/75609551972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e1c8996-b506-4ef3-8cc5-3666c0ae3f3a/91689117694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66740db7-6b94-4922-939b-c4a5a9b892a3/dufapemiterisunuxepovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ea0e50-d622-42db-9163-f7482c72004c/91722267705.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_off0000d258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD258 5468 bytes
SHA-256: 180df35255a333037a986f8aad792cd96a3b06de3680caa74348c50f88d5907d
font_01_sfnt_off0000e50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50B 10068 bytes
SHA-256: 9655329000039b33dae38b9f33522a696078cf478fd79ac04f5c0c18aa11aef3