Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd3df2957dcb385…

MALICIOUS

PDF

86.2 KB Created: 2021-03-15 17:13:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9dcc3b3f4a8bbf094996e6ca9951c0eb SHA-1: a3f9ad7e7baf968065d590a79cc0f888b138c888 SHA-256: 7dd3df2957dcb385c4ba7a35454755040bafc6ca30a45ffb6d1858b90514076d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on dynamic DNS services or link farms, suggesting a phishing or malware distribution attempt. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a tactic of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://golowaki.ru/wix?keyword=example+of+invitation+letter+for+guest+speaker+for+seminar PDF link annotation
    • http://mukinumatonewo.getenjoyment.net/98816598571.pdfIn PDF document text
    • https://riwurarelix.weebly.com/uploads/1/3/4/4/134484082/6231303.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/how_to_prime_traxxas_t-maxx.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/absceso_hepatico_etiologia.pdfIn PDF document text
    • https://gadebalemalun.weebly.com/uploads/1/3/4/4/134443756/vavaviduxi_zejepunukewawe.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/lugodebobikubafijuponub.pdfIn PDF document text
    • https://kekufekogaj.weebly.com/uploads/1/3/4/7/134768560/jibobag-dikokozulalori.pdfIn PDF document text
    • https://sowotelimavo.weebly.com/uploads/1/3/4/0/134000290/lutugowutava.pdfIn PDF document text
    • http://rajajime.mypressonline.com/computer_organization_and_design_chapter_4_solutions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/takateg/63850274150.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/new_york_travel_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/blank_flash_card_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/free_web_design_templates_for_online_shopping.pdfIn PDF document text
    • http://rorokepu.atwebpages.com/que_es_el_anabolismo.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/becoming_cht_michelle.pdfIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_a5abac357be3436da1954249e04b5aaf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/circuit_maker_2000_free.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/wopujubitexukejal.pdfIn PDF document text
    • https://0a37a3d5-a0bf-4e77-8ff5-6127fd08aefa.filesusr.com/ugd/6046c9_7064f87fe38e478e95e86f6d55a17224.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/renedaviremubor.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/60121981470.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_off00011173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11173 5368 bytes
SHA-256: 5785d82bed53f39502b440f7d17a88150c95856a3b635b98cbf763f50107cd29
font_01_sfnt_off000123b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B7 11988 bytes
SHA-256: 2a1f16fb9048c9ec876268b22aa236dc0903fc273236ecbb7e4f206486804213

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